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	/*
	* Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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	*/

	/*
	* This file is available under and governed by the GNU General Public
	* License version 2 only, as published by the Free Software Foundation.
	* However, the following notice accompanied the original version of this
	* file:
	*
	* Copyright (c) 2007-2012, Stephen Colebourne & Michael Nascimento Santos
	*
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are met:
	*
	* * Redistributions of source code must retain the above copyright notice,
	* this list of conditions and the following disclaimer.
	*
	* * Redistributions in binary form must reproduce the above copyright notice,
	* this list of conditions and the following disclaimer in the documentation
	* and/or other materials provided with the distribution.
	*
	* * Neither the name of JSR-310 nor the names of its contributors
	* may be used to endorse or promote products derived from this software
	* without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
	* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
	* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/
	package java.time;

	import static java.time.LocalTime.SECONDS_PER_DAY;
	import static java.time.temporal.ChronoField.ALIGNED_DAY_OF_WEEK_IN_MONTH;
	import static java.time.temporal.ChronoField.ALIGNED_DAY_OF_WEEK_IN_YEAR;
	import static java.time.temporal.ChronoField.ALIGNED_WEEK_OF_MONTH;
	import static java.time.temporal.ChronoField.ALIGNED_WEEK_OF_YEAR;
	import static java.time.temporal.ChronoField.DAY_OF_MONTH;
	import static java.time.temporal.ChronoField.DAY_OF_YEAR;
	import static java.time.temporal.ChronoField.EPOCH_DAY;
	import static java.time.temporal.ChronoField.ERA;
	import static java.time.temporal.ChronoField.MONTH_OF_YEAR;
	import static java.time.temporal.ChronoField.PROLEPTIC_MONTH;
	import static java.time.temporal.ChronoField.YEAR;

	import java.io.DataInput;
	import java.io.DataOutput;
	import java.io.IOException;
	import java.io.InvalidObjectException;
	import java.io.ObjectInputStream;
	import java.io.Serializable;
	import java.time.chrono.ChronoLocalDate;
	import java.time.chrono.Era;
	import java.time.chrono.IsoChronology;
	import java.time.format.DateTimeFormatter;
	import java.time.format.DateTimeParseException;
	import java.time.temporal.ChronoField;
	import java.time.temporal.ChronoUnit;
	import java.time.temporal.Temporal;
	import java.time.temporal.TemporalAccessor;
	import java.time.temporal.TemporalAdjuster;
	import java.time.temporal.TemporalAmount;
	import java.time.temporal.TemporalField;
	import java.time.temporal.TemporalQueries;
	import java.time.temporal.TemporalQuery;
	import java.time.temporal.TemporalUnit;
	import java.time.temporal.UnsupportedTemporalTypeException;
	import java.time.temporal.ValueRange;
	import java.time.zone.ZoneOffsetTransition;
	import java.time.zone.ZoneRules;
	import java.util.Objects;

	/**
	* A date without a time-zone in the ISO-8601 calendar system,
	* such as {@code 2007-12-03}.
	* <p>
	* {@code LocalDate} is an immutable date-time object that represents a date,
	* often viewed as year-month-day. Other date fields, such as day-of-year,
	* day-of-week and week-of-year, can also be accessed.
	* For example, the value "2nd October 2007" can be stored in a {@code LocalDate}.
	* <p>
	* This class does not store or represent a time or time-zone.
	* Instead, it is a description of the date, as used for birthdays.
	* It cannot represent an instant on the time-line without additional information
	* such as an offset or time-zone.
	* <p>
	* The ISO-8601 calendar system is the modern civil calendar system used today
	* in most of the world. It is equivalent to the proleptic Gregorian calendar
	* system, in which today's rules for leap years are applied for all time.
	* For most applications written today, the ISO-8601 rules are entirely suitable.
	* However, any application that makes use of historical dates, and requires them
	* to be accurate will find the ISO-8601 approach unsuitable.
	*
	* <p>
	* This is a <a href="{@docRoot}/java/lang/doc-files/ValueBased.html">value-based</a>
	* class; use of identity-sensitive operations (including reference equality
	* ({@code ==}), identity hash code, or synchronization) on instances of
	* {@code LocalDate} may have unpredictable results and should be avoided.
	* The {@code equals} method should be used for comparisons.
	*
	* @implSpec
	* This class is immutable and thread-safe.
	*
	* @since 1.8
	*/
	public final class LocalDate
	implements Temporal, TemporalAdjuster, ChronoLocalDate, Serializable {

	/**
	* The minimum supported {@code LocalDate}, '-999999999-01-01'.
	* This could be used by an application as a "far past" date.
	*/
	public static final LocalDate MIN = LocalDate.of(Year.MIN_VALUE, 1, 1);
	/**
	* The maximum supported {@code LocalDate}, '+999999999-12-31'.
	* This could be used by an application as a "far future" date.
	*/
	public static final LocalDate MAX = LocalDate.of(Year.MAX_VALUE, 12, 31);

	/**
	* Serialization version.
	*/
	private static final long serialVersionUID = 2942565459149668126L;
	/**
	* The number of days in a 400 year cycle.
	*/
	private static final int DAYS_PER_CYCLE = 146097;
	/**
	* The number of days from year zero to year 1970.
	* There are five 400 year cycles from year zero to 2000.
	* There are 7 leap years from 1970 to 2000.
	*/
	static final long DAYS_0000_TO_1970 = (DAYS_PER_CYCLE * 5L) - (30L * 365L + 7L);

	/**
	* The year.
	*/
	private final int year;
	/**
	* The month-of-year.
	*/
	private final short month;
	/**
	* The day-of-month.
	*/
	private final short day;

	//-----------------------------------------------------------------------
	/**
	* Obtains the current date from the system clock in the default time-zone.
	* <p>
	* This will query the {@link Clock#systemDefaultZone() system clock} in the default
	* time-zone to obtain the current date.
	* <p>
	* Using this method will prevent the ability to use an alternate clock for testing
	* because the clock is hard-coded.
	*
	* @return the current date using the system clock and default time-zone, not null
	*/
	public static LocalDate now() {
	return now(Clock.systemDefaultZone());
	}

	/**
	* Obtains the current date from the system clock in the specified time-zone.
	* <p>
	* This will query the {@link Clock#system(ZoneId) system clock} to obtain the current date.
	* Specifying the time-zone avoids dependence on the default time-zone.
	* <p>
	* Using this method will prevent the ability to use an alternate clock for testing
	* because the clock is hard-coded.
	*
	* @param zone the zone ID to use, not null
	* @return the current date using the system clock, not null
	*/
	public static LocalDate now(ZoneId zone) {
	return now(Clock.system(zone));
	}

	/**
	* Obtains the current date from the specified clock.
	* <p>
	* This will query the specified clock to obtain the current date - today.
	* Using this method allows the use of an alternate clock for testing.
	* The alternate clock may be introduced using {@link Clock dependency injection}.
	*
	* @param clock the clock to use, not null
	* @return the current date, not null
	*/
	public static LocalDate now(Clock clock) {
	Objects.requireNonNull(clock, "clock");
	// inline to avoid creating object and Instant checks
	final Instant now = clock.instant(); // called once
	ZoneOffset offset = clock.getZone().getRules().getOffset(now);
	long epochSec = now.getEpochSecond() + offset.getTotalSeconds(); // overflow caught later
	long epochDay = Math.floorDiv(epochSec, SECONDS_PER_DAY);
	return LocalDate.ofEpochDay(epochDay);
	}

	//-----------------------------------------------------------------------
	/**
	* Obtains an instance of {@code LocalDate} from a year, month and day.
	* <p>
	* This returns a {@code LocalDate} with the specified year, month and day-of-month.
	* The day must be valid for the year and month, otherwise an exception will be thrown.
	*
	* @param year the year to represent, from MIN_YEAR to MAX_YEAR
	* @param month the month-of-year to represent, not null
	* @param dayOfMonth the day-of-month to represent, from 1 to 31
	* @return the local date, not null
	* @throws DateTimeException if the value of any field is out of range,
	* or if the day-of-month is invalid for the month-year
	*/
	public static LocalDate of(int year, Month month, int dayOfMonth) {
	YEAR.checkValidValue(year);
	Objects.requireNonNull(month, "month");
	DAY_OF_MONTH.checkValidValue(dayOfMonth);
	return create(year, month.getValue(), dayOfMonth);
	}

	/**
	* Obtains an instance of {@code LocalDate} from a year, month and day.
	* <p>
	* This returns a {@code LocalDate} with the specified year, month and day-of-month.
	* The day must be valid for the year and month, otherwise an exception will be thrown.
	*
	* @param year the year to represent, from MIN_YEAR to MAX_YEAR
	* @param month the month-of-year to represent, from 1 (January) to 12 (December)
	* @param dayOfMonth the day-of-month to represent, from 1 to 31
	* @return the local date, not null
	* @throws DateTimeException if the value of any field is out of range,
	* or if the day-of-month is invalid for the month-year
	*/
	public static LocalDate of(int year, int month, int dayOfMonth) {
	YEAR.checkValidValue(year);
	MONTH_OF_YEAR.checkValidValue(month);
	DAY_OF_MONTH.checkValidValue(dayOfMonth);
	return create(year, month, dayOfMonth);
	}

	//-----------------------------------------------------------------------
	/**
	* Obtains an instance of {@code LocalDate} from a year and day-of-year.
	* <p>
	* This returns a {@code LocalDate} with the specified year and day-of-year.
	* The day-of-year must be valid for the year, otherwise an exception will be thrown.
	*
	* @param year the year to represent, from MIN_YEAR to MAX_YEAR
	* @param dayOfYear the day-of-year to represent, from 1 to 366
	* @return the local date, not null
	* @throws DateTimeException if the value of any field is out of range,
	* or if the day-of-year is invalid for the year
	*/
	public static LocalDate ofYearDay(int year, int dayOfYear) {
	YEAR.checkValidValue(year);
	DAY_OF_YEAR.checkValidValue(dayOfYear);
	boolean leap = IsoChronology.INSTANCE.isLeapYear(year);
	if (dayOfYear == 366 && leap == false) {
	throw new DateTimeException("Invalid date 'DayOfYear 366' as '" + year + "' is not a leap year");
	}
	Month moy = Month.of((dayOfYear - 1) / 31 + 1);
	int monthEnd = moy.firstDayOfYear(leap) + moy.length(leap) - 1;
	if (dayOfYear > monthEnd) {
	moy = moy.plus(1);
	}
	int dom = dayOfYear - moy.firstDayOfYear(leap) + 1;
	return new LocalDate(year, moy.getValue(), dom);
	}

	//-----------------------------------------------------------------------
	/**
	* Obtains an instance of {@code LocalDate} from the epoch day count.
	* <p>
	* This returns a {@code LocalDate} with the specified epoch-day.
	* The {@link ChronoField#EPOCH_DAY EPOCH_DAY} is a simple incrementing count
	* of days where day 0 is 1970-01-01. Negative numbers represent earlier days.
	*
	* @param epochDay the Epoch Day to convert, based on the epoch 1970-01-01
	* @return the local date, not null
	* @throws DateTimeException if the epoch day exceeds the supported date range
	*/
	public static LocalDate ofEpochDay(long epochDay) {
	long zeroDay = epochDay + DAYS_0000_TO_1970;
	// find the march-based year
	zeroDay -= 60; // adjust to 0000-03-01 so leap day is at end of four year cycle
	long adjust = 0;
	if (zeroDay < 0) {
	// adjust negative years to positive for calculation
	long adjustCycles = (zeroDay + 1) / DAYS_PER_CYCLE - 1;
	adjust = adjustCycles * 400;
	zeroDay += -adjustCycles * DAYS_PER_CYCLE;
	}
	long yearEst = (400 * zeroDay + 591) / DAYS_PER_CYCLE;
	long doyEst = zeroDay - (365 * yearEst + yearEst / 4 - yearEst / 100 + yearEst / 400);
	if (doyEst < 0) {
	// fix estimate
	yearEst--;
	doyEst = zeroDay - (365 * yearEst + yearEst / 4 - yearEst / 100 + yearEst / 400);
	}
	yearEst += adjust; // reset any negative year
	int marchDoy0 = (int) doyEst;

	// convert march-based values back to january-based
	int marchMonth0 = (marchDoy0 * 5 + 2) / 153;
	int month = (marchMonth0 + 2) % 12 + 1;
	int dom = marchDoy0 - (marchMonth0 * 306 + 5) / 10 + 1;
	yearEst += marchMonth0 / 10;

	// check year now we are certain it is correct
	int year = YEAR.checkValidIntValue(yearEst);
	return new LocalDate(year, month, dom);
	}

	//-----------------------------------------------------------------------
	/**
	* Obtains an instance of {@code LocalDate} from a temporal object.
	* <p>
	* This obtains a local date based on the specified temporal.
	* A {@code TemporalAccessor} represents an arbitrary set of date and time information,
	* which this factory converts to an instance of {@code LocalDate}.
	* <p>
	* The conversion uses the {@link TemporalQueries#localDate()} query, which relies
	* on extracting the {@link ChronoField#EPOCH_DAY EPOCH_DAY} field.
	* <p>
	* This method matches the signature of the functional interface {@link TemporalQuery}
	* allowing it to be used as a query via method reference, {@code LocalDate::from}.
	*
	* @param temporal the temporal object to convert, not null
	* @return the local date, not null
	* @throws DateTimeException if unable to convert to a {@code LocalDate}
	*/
	public static LocalDate from(TemporalAccessor temporal) {
	Objects.requireNonNull(temporal, "temporal");
	LocalDate date = temporal.query(TemporalQueries.localDate());
	if (date == null) {
	throw new DateTimeException("Unable to obtain LocalDate from TemporalAccessor: " +
	temporal + " of type " + temporal.getClass().getName());
	}
	return date;
	}

	//-----------------------------------------------------------------------
	/**
	* Obtains an instance of {@code LocalDate} from a text string such as {@code 2007-12-03}.
	* <p>
	* The string must represent a valid date and is parsed using
	* {@link java.time.format.DateTimeFormatter#ISO_LOCAL_DATE}.
	*
	* @param text the text to parse such as "2007-12-03", not null
	* @return the parsed local date, not null
	* @throws DateTimeParseException if the text cannot be parsed
	*/
	public static LocalDate parse(CharSequence text) {
	return parse(text, DateTimeFormatter.ISO_LOCAL_DATE);
	}

	/**
	* Obtains an instance of {@code LocalDate} from a text string using a specific formatter.
	* <p>
	* The text is parsed using the formatter, returning a date.
	*
	* @param text the text to parse, not null
	* @param formatter the formatter to use, not null
	* @return the parsed local date, not null
	* @throws DateTimeParseException if the text cannot be parsed
	*/
	public static LocalDate parse(CharSequence text, DateTimeFormatter formatter) {
	Objects.requireNonNull(formatter, "formatter");
	return formatter.parse(text, LocalDate::from);
	}

	//-----------------------------------------------------------------------
	/**
	* Creates a local date from the year, month and day fields.
	*
	* @param year the year to represent, validated from MIN_YEAR to MAX_YEAR
	* @param month the month-of-year to represent, from 1 to 12, validated
	* @param dayOfMonth the day-of-month to represent, validated from 1 to 31
	* @return the local date, not null
	* @throws DateTimeException if the day-of-month is invalid for the month-year
	*/
	private static LocalDate create(int year, int month, int dayOfMonth) {
	if (dayOfMonth > 28) {
	int dom = 31;
	switch (month) {
	case 2:
	dom = (IsoChronology.INSTANCE.isLeapYear(year) ? 29 : 28);
	break;
	case 4:
	case 6:
	case 9:
	case 11:
	dom = 30;
	break;
	}
	if (dayOfMonth > dom) {
	if (dayOfMonth == 29) {
	throw new DateTimeException("Invalid date 'February 29' as '" + year + "' is not a leap year");
	} else {
	throw new DateTimeException("Invalid date '" + Month.of(month).name() + " " + dayOfMonth + "'");
	}
	}
	}
	return new LocalDate(year, month, dayOfMonth);
	}

	/**
	* Resolves the date, resolving days past the end of month.
	*
	* @param year the year to represent, validated from MIN_YEAR to MAX_YEAR
	* @param month the month-of-year to represent, validated from 1 to 12
	* @param day the day-of-month to represent, validated from 1 to 31
	* @return the resolved date, not null
	*/
	private static LocalDate resolvePreviousValid(int year, int month, int day) {
	switch (month) {
	case 2:
	day = Math.min(day, IsoChronology.INSTANCE.isLeapYear(year) ? 29 : 28);
	break;
	case 4:
	case 6:
	case 9:
	case 11:
	day = Math.min(day, 30);
	break;
	}
	return new LocalDate(year, month, day);
	}

	/**
	* Constructor, previously validated.
	*
	* @param year the year to represent, from MIN_YEAR to MAX_YEAR
	* @param month the month-of-year to represent, not null
	* @param dayOfMonth the day-of-month to represent, valid for year-month, from 1 to 31
	*/
	private LocalDate(int year, int month, int dayOfMonth) {
	this.year = year;
	this.month = (short) month;
	this.day = (short) dayOfMonth;
	}

	//-----------------------------------------------------------------------
	/**
	* Checks if the specified field is supported.
	* <p>
	* This checks if this date can be queried for the specified field.
	* If false, then calling the {@link #range(TemporalField) range},
	* {@link #get(TemporalField) get} and {@link #with(TemporalField, long)}
	* methods will throw an exception.
	* <p>
	* If the field is a {@link ChronoField} then the query is implemented here.
	* The supported fields are:
	* <ul>
	* <li>{@code DAY_OF_WEEK}
	* <li>{@code ALIGNED_DAY_OF_WEEK_IN_MONTH}
	* <li>{@code ALIGNED_DAY_OF_WEEK_IN_YEAR}
	* <li>{@code DAY_OF_MONTH}
	* <li>{@code DAY_OF_YEAR}
	* <li>{@code EPOCH_DAY}
	* <li>{@code ALIGNED_WEEK_OF_MONTH}
	* <li>{@code ALIGNED_WEEK_OF_YEAR}
	* <li>{@code MONTH_OF_YEAR}
	* <li>{@code PROLEPTIC_MONTH}
	* <li>{@code YEAR_OF_ERA}
	* <li>{@code YEAR}
	* <li>{@code ERA}
	* </ul>
	* All other {@code ChronoField} instances will return false.
	* <p>
	* If the field is not a {@code ChronoField}, then the result of this method
	* is obtained by invoking {@code TemporalField.isSupportedBy(TemporalAccessor)}
	* passing {@code this} as the argument.
	* Whether the field is supported is determined by the field.
	*
	* @param field the field to check, null returns false
	* @return true if the field is supported on this date, false if not
	*/
	@Override // override for Javadoc
	public boolean isSupported(TemporalField field) {
	return ChronoLocalDate.super.isSupported(field);
	}

	/**
	* Checks if the specified unit is supported.
	* <p>
	* This checks if the specified unit can be added to, or subtracted from, this date.
	* If false, then calling the {@link #plus(long, TemporalUnit)} and
	* {@link #minus(long, TemporalUnit) minus} methods will throw an exception.
	* <p>
	* If the unit is a {@link ChronoUnit} then the query is implemented here.
	* The supported units are:
	* <ul>
	* <li>{@code DAYS}
	* <li>{@code WEEKS}
	* <li>{@code MONTHS}
	* <li>{@code YEARS}
	* <li>{@code DECADES}
	* <li>{@code CENTURIES}
	* <li>{@code MILLENNIA}
	* <li>{@code ERAS}
	* </ul>
	* All other {@code ChronoUnit} instances will return false.
	* <p>
	* If the unit is not a {@code ChronoUnit}, then the result of this method
	* is obtained by invoking {@code TemporalUnit.isSupportedBy(Temporal)}
	* passing {@code this} as the argument.
	* Whether the unit is supported is determined by the unit.
	*
	* @param unit the unit to check, null returns false
	* @return true if the unit can be added/subtracted, false if not
	*/
	@Override // override for Javadoc
	public boolean isSupported(TemporalUnit unit) {
	return ChronoLocalDate.super.isSupported(unit);
	}

	//-----------------------------------------------------------------------
	/**
	* Gets the range of valid values for the specified field.
	* <p>
	* The range object expresses the minimum and maximum valid values for a field.
	* This date is used to enhance the accuracy of the returned range.
	* If it is not possible to return the range, because the field is not supported
	* or for some other reason, an exception is thrown.
	* <p>
	* If the field is a {@link ChronoField} then the query is implemented here.
	* The {@link #isSupported(TemporalField) supported fields} will return
	* appropriate range instances.
	* All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.
	* <p>
	* If the field is not a {@code ChronoField}, then the result of this method
	* is obtained by invoking {@code TemporalField.rangeRefinedBy(TemporalAccessor)}
	* passing {@code this} as the argument.
	* Whether the range can be obtained is determined by the field.
	*
	* @param field the field to query the range for, not null
	* @return the range of valid values for the field, not null
	* @throws DateTimeException if the range for the field cannot be obtained
	* @throws UnsupportedTemporalTypeException if the field is not supported
	*/
	@Override
	public ValueRange range(TemporalField field) {
	if (field instanceof ChronoField) {
	ChronoField f = (ChronoField) field;
	if (f.isDateBased()) {
	switch (f) {
	case DAY_OF_MONTH: return ValueRange.of(1, lengthOfMonth());
	case DAY_OF_YEAR: return ValueRange.of(1, lengthOfYear());
	case ALIGNED_WEEK_OF_MONTH: return ValueRange.of(1, getMonth() == Month.FEBRUARY && isLeapYear() == false ? 4 : 5);
	case YEAR_OF_ERA:
	return (getYear() <= 0 ? ValueRange.of(1, Year.MAX_VALUE + 1) : ValueRange.of(1, Year.MAX_VALUE));
	}
	return field.range();
	}
	throw new UnsupportedTemporalTypeException("Unsupported field: " + field);
	}
	return field.rangeRefinedBy(this);
	}

	/**
	* Gets the value of the specified field from this date as an {@code int}.
	* <p>
	* This queries this date for the value of the specified field.
	* The returned value will always be within the valid range of values for the field.
	* If it is not possible to return the value, because the field is not supported
	* or for some other reason, an exception is thrown.
	* <p>
	* If the field is a {@link ChronoField} then the query is implemented here.
	* The {@link #isSupported(TemporalField) supported fields} will return valid
	* values based on this date, except {@code EPOCH_DAY} and {@code PROLEPTIC_MONTH}
	* which are too large to fit in an {@code int} and throw a {@code DateTimeException}.
	* All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.
	* <p>
	* If the field is not a {@code ChronoField}, then the result of this method
	* is obtained by invoking {@code TemporalField.getFrom(TemporalAccessor)}
	* passing {@code this} as the argument. Whether the value can be obtained,
	* and what the value represents, is determined by the field.
	*
	* @param field the field to get, not null
	* @return the value for the field
	* @throws DateTimeException if a value for the field cannot be obtained or
	* the value is outside the range of valid values for the field
	* @throws UnsupportedTemporalTypeException if the field is not supported or
	* the range of values exceeds an {@code int}
	* @throws ArithmeticException if numeric overflow occurs
	*/
	@Override // override for Javadoc and performance
	public int get(TemporalField field) {
	if (field instanceof ChronoField) {
	return get0(field);
	}
	return ChronoLocalDate.super.get(field);
	}

	/**
	* Gets the value of the specified field from this date as a {@code long}.
	* <p>
	* This queries this date for the value of the specified field.
	* If it is not possible to return the value, because the field is not supported
	* or for some other reason, an exception is thrown.
	* <p>
	* If the field is a {@link ChronoField} then the query is implemented here.
	* The {@link #isSupported(TemporalField) supported fields} will return valid
	* values based on this date.
	* All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.
	* <p>
	* If the field is not a {@code ChronoField}, then the result of this method
	* is obtained by invoking {@code TemporalField.getFrom(TemporalAccessor)}
	* passing {@code this} as the argument. Whether the value can be obtained,
	* and what the value represents, is determined by the field.
	*
	* @param field the field to get, not null
	* @return the value for the field
	* @throws DateTimeException if a value for the field cannot be obtained
	* @throws UnsupportedTemporalTypeException if the field is not supported
	* @throws ArithmeticException if numeric overflow occurs
	*/
	@Override
	public long getLong(TemporalField field) {
	if (field instanceof ChronoField) {
	if (field == EPOCH_DAY) {
	return toEpochDay();
	}
	if (field == PROLEPTIC_MONTH) {
	return getProlepticMonth();
	}
	return get0(field);
	}
	return field.getFrom(this);
	}

	private int get0(TemporalField field) {
	switch ((ChronoField) field) {
	case DAY_OF_WEEK: return getDayOfWeek().getValue();
	case ALIGNED_DAY_OF_WEEK_IN_MONTH: return ((day - 1) % 7) + 1;
	case ALIGNED_DAY_OF_WEEK_IN_YEAR: return ((getDayOfYear() - 1) % 7) + 1;
	case DAY_OF_MONTH: return day;
	case DAY_OF_YEAR: return getDayOfYear();
	case EPOCH_DAY: throw new UnsupportedTemporalTypeException("Invalid field 'EpochDay' for get() method, use getLong() instead");
	case ALIGNED_WEEK_OF_MONTH: return ((day - 1) / 7) + 1;
	case ALIGNED_WEEK_OF_YEAR: return ((getDayOfYear() - 1) / 7) + 1;
	case MONTH_OF_YEAR: return month;
	case PROLEPTIC_MONTH: throw new UnsupportedTemporalTypeException("Invalid field 'ProlepticMonth' for get() method, use getLong() instead");
	case YEAR_OF_ERA: return (year >= 1 ? year : 1 - year);
	case YEAR: return year;
	case ERA: return (year >= 1 ? 1 : 0);
	}
	throw new UnsupportedTemporalTypeException("Unsupported field: " + field);
	}

	private long getProlepticMonth() {
	return (year * 12L + month - 1);
	}

	//-----------------------------------------------------------------------
	/**
	* Gets the chronology of this date, which is the ISO calendar system.
	* <p>
	* The {@code Chronology} represents the calendar system in use.
	* The ISO-8601 calendar system is the modern civil calendar system used today
	* in most of the world. It is equivalent to the proleptic Gregorian calendar
	* system, in which today's rules for leap years are applied for all time.
	*
	* @return the ISO chronology, not null
	*/
	@Override
	public IsoChronology getChronology() {
	return IsoChronology.INSTANCE;
	}

	/**
	* Gets the era applicable at this date.
	* <p>
	* The official ISO-8601 standard does not define eras, however {@code IsoChronology} does.
	* It defines two eras, 'CE' from year one onwards and 'BCE' from year zero backwards.
	* Since dates before the Julian-Gregorian cutover are not in line with history,
	* the cutover between 'BCE' and 'CE' is also not aligned with the commonly used
	* eras, often referred to using 'BC' and 'AD'.
	* <p>
	* Users of this class should typically ignore this method as it exists primarily
	* to fulfill the {@link ChronoLocalDate} contract where it is necessary to support
	* the Japanese calendar system.
	* <p>
	* The returned era will be a singleton capable of being compared with the constants
	* in {@link IsoChronology} using the {@code ==} operator.
	*
	* @return the {@code IsoChronology} era constant applicable at this date, not null
	*/
	@Override // override for Javadoc
	public Era getEra() {
	return ChronoLocalDate.super.getEra();
	}

	/**
	* Gets the year field.
	* <p>
	* This method returns the primitive {@code int} value for the year.
	* <p>
	* The year returned by this method is proleptic as per {@code get(YEAR)}.
	* To obtain the year-of-era, use {@code get(YEAR_OF_ERA)}.
	*
	* @return the year, from MIN_YEAR to MAX_YEAR
	*/
	public int getYear() {
	return year;
	}

	/**
	* Gets the month-of-year field from 1 to 12.
	* <p>
	* This method returns the month as an {@code int} from 1 to 12.
	* Application code is frequently clearer if the enum {@link Month}
	* is used by calling {@link #getMonth()}.
	*
	* @return the month-of-year, from 1 to 12
	* @see #getMonth()
	*/
	public int getMonthValue() {
	return month;
	}

	/**
	* Gets the month-of-year field using the {@code Month} enum.
	* <p>
	* This method returns the enum {@link Month} for the month.
	* This avoids confusion as to what {@code int} values mean.
	* If you need access to the primitive {@code int} value then the enum
	* provides the {@link Month#getValue() int value}.
	*
	* @return the month-of-year, not null
	* @see #getMonthValue()
	*/
	public Month getMonth() {
	return Month.of(month);
	}

	/**
	* Gets the day-of-month field.
	* <p>
	* This method returns the primitive {@code int} value for the day-of-month.
	*
	* @return the day-of-month, from 1 to 31
	*/
	public int getDayOfMonth() {
	return day;
	}

	/**
	* Gets the day-of-year field.
	* <p>
	* This method returns the primitive {@code int} value for the day-of-year.
	*
	* @return the day-of-year, from 1 to 365, or 366 in a leap year
	*/
	public int getDayOfYear() {
	return getMonth().firstDayOfYear(isLeapYear()) + day - 1;
	}

	/**
	* Gets the day-of-week field, which is an enum {@code DayOfWeek}.
	* <p>
	* This method returns the enum {@link DayOfWeek} for the day-of-week.
	* This avoids confusion as to what {@code int} values mean.
	* If you need access to the primitive {@code int} value then the enum
	* provides the {@link DayOfWeek#getValue() int value}.
	* <p>
	* Additional information can be obtained from the {@code DayOfWeek}.
	* This includes textual names of the values.
	*
	* @return the day-of-week, not null
	*/
	public DayOfWeek getDayOfWeek() {
	int dow0 = (int)Math.floorMod(toEpochDay() + 3, 7);
	return DayOfWeek.of(dow0 + 1);
	}

	//-----------------------------------------------------------------------
	/**
	* Checks if the year is a leap year, according to the ISO proleptic
	* calendar system rules.
	* <p>
	* This method applies the current rules for leap years across the whole time-line.
	* In general, a year is a leap year if it is divisible by four without
	* remainder. However, years divisible by 100, are not leap years, with
	* the exception of years divisible by 400 which are.
	* <p>
	* For example, 1904 is a leap year it is divisible by 4.
	* 1900 was not a leap year as it is divisible by 100, however 2000 was a
	* leap year as it is divisible by 400.
	* <p>
	* The calculation is proleptic - applying the same rules into the far future and far past.
	* This is historically inaccurate, but is correct for the ISO-8601 standard.
	*
	* @return true if the year is leap, false otherwise
	*/
	@Override // override for Javadoc and performance
	public boolean isLeapYear() {
	return IsoChronology.INSTANCE.isLeapYear(year);
	}

	/**
	* Returns the length of the month represented by this date.
	* <p>
	* This returns the length of the month in days.
	* For example, a date in January would return 31.
	*
	* @return the length of the month in days
	*/
	@Override
	public int lengthOfMonth() {
	switch (month) {
	case 2:
	return (isLeapYear() ? 29 : 28);
	case 4:
	case 6:
	case 9:
	case 11:
	return 30;
	default:
	return 31;
	}
	}

	/**
	* Returns the length of the year represented by this date.
	* <p>
	* This returns the length of the year in days, either 365 or 366.
	*
	* @return 366 if the year is leap, 365 otherwise
	*/
	@Override // override for Javadoc and performance
	public int lengthOfYear() {
	return (isLeapYear() ? 366 : 365);
	}

	//-----------------------------------------------------------------------
	/**
	* Returns an adjusted copy of this date.
	* <p>
	* This returns a {@code LocalDate}, based on this one, with the date adjusted.
	* The adjustment takes place using the specified adjuster strategy object.
	* Read the documentation of the adjuster to understand what adjustment will be made.
	* <p>
	* A simple adjuster might simply set the one of the fields, such as the year field.
	* A more complex adjuster might set the date to the last day of the month.
	* <p>
	* A selection of common adjustments is provided in
	* {@link java.time.temporal.TemporalAdjusters TemporalAdjusters}.
	* These include finding the "last day of the month" and "next Wednesday".
	* Key date-time classes also implement the {@code TemporalAdjuster} interface,
	* such as {@link Month} and {@link java.time.MonthDay MonthDay}.
	* The adjuster is responsible for handling special cases, such as the varying
	* lengths of month and leap years.
	* <p>
	* For example this code returns a date on the last day of July:
	* <pre>
	* import static java.time.Month.*;
	* import static java.time.temporal.TemporalAdjusters.*;
	*
	* result = localDate.with(JULY).with(lastDayOfMonth());
	* </pre>
	* <p>
	* The result of this method is obtained by invoking the
	* {@link TemporalAdjuster#adjustInto(Temporal)} method on the
	* specified adjuster passing {@code this} as the argument.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param adjuster the adjuster to use, not null
	* @return a {@code LocalDate} based on {@code this} with the adjustment made, not null
	* @throws DateTimeException if the adjustment cannot be made
	* @throws ArithmeticException if numeric overflow occurs
	*/
	@Override
	public LocalDate with(TemporalAdjuster adjuster) {
	// optimizations
	if (adjuster instanceof LocalDate) {
	return (LocalDate) adjuster;
	}
	return (LocalDate) adjuster.adjustInto(this);
	}

	/**
	* Returns a copy of this date with the specified field set to a new value.
	* <p>
	* This returns a {@code LocalDate}, based on this one, with the value
	* for the specified field changed.
	* This can be used to change any supported field, such as the year, month or day-of-month.
	* If it is not possible to set the value, because the field is not supported or for
	* some other reason, an exception is thrown.
	* <p>
	* In some cases, changing the specified field can cause the resulting date to become invalid,
	* such as changing the month from 31st January to February would make the day-of-month invalid.
	* In cases like this, the field is responsible for resolving the date. Typically it will choose
	* the previous valid date, which would be the last valid day of February in this example.
	* <p>
	* If the field is a {@link ChronoField} then the adjustment is implemented here.
	* The supported fields behave as follows:
	* <ul>
	* <li>{@code DAY_OF_WEEK} -
	* Returns a {@code LocalDate} with the specified day-of-week.
	* The date is adjusted up to 6 days forward or backward within the boundary
	* of a Monday to Sunday week.
	* <li>{@code ALIGNED_DAY_OF_WEEK_IN_MONTH} -
	* Returns a {@code LocalDate} with the specified aligned-day-of-week.
	* The date is adjusted to the specified month-based aligned-day-of-week.
	* Aligned weeks are counted such that the first week of a given month starts
	* on the first day of that month.
	* This may cause the date to be moved up to 6 days into the following month.
	* <li>{@code ALIGNED_DAY_OF_WEEK_IN_YEAR} -
	* Returns a {@code LocalDate} with the specified aligned-day-of-week.
	* The date is adjusted to the specified year-based aligned-day-of-week.
	* Aligned weeks are counted such that the first week of a given year starts
	* on the first day of that year.
	* This may cause the date to be moved up to 6 days into the following year.
	* <li>{@code DAY_OF_MONTH} -
	* Returns a {@code LocalDate} with the specified day-of-month.
	* The month and year will be unchanged. If the day-of-month is invalid for the
	* year and month, then a {@code DateTimeException} is thrown.
	* <li>{@code DAY_OF_YEAR} -
	* Returns a {@code LocalDate} with the specified day-of-year.
	* The year will be unchanged. If the day-of-year is invalid for the
	* year, then a {@code DateTimeException} is thrown.
	* <li>{@code EPOCH_DAY} -
	* Returns a {@code LocalDate} with the specified epoch-day.
	* This completely replaces the date and is equivalent to {@link #ofEpochDay(long)}.
	* <li>{@code ALIGNED_WEEK_OF_MONTH} -
	* Returns a {@code LocalDate} with the specified aligned-week-of-month.
	* Aligned weeks are counted such that the first week of a given month starts
	* on the first day of that month.
	* This adjustment moves the date in whole week chunks to match the specified week.
	* The result will have the same day-of-week as this date.
	* This may cause the date to be moved into the following month.
	* <li>{@code ALIGNED_WEEK_OF_YEAR} -
	* Returns a {@code LocalDate} with the specified aligned-week-of-year.
	* Aligned weeks are counted such that the first week of a given year starts
	* on the first day of that year.
	* This adjustment moves the date in whole week chunks to match the specified week.
	* The result will have the same day-of-week as this date.
	* This may cause the date to be moved into the following year.
	* <li>{@code MONTH_OF_YEAR} -
	* Returns a {@code LocalDate} with the specified month-of-year.
	* The year will be unchanged. The day-of-month will also be unchanged,
	* unless it would be invalid for the new month and year. In that case, the
	* day-of-month is adjusted to the maximum valid value for the new month and year.
	* <li>{@code PROLEPTIC_MONTH} -
	* Returns a {@code LocalDate} with the specified proleptic-month.
	* The day-of-month will be unchanged, unless it would be invalid for the new month
	* and year. In that case, the day-of-month is adjusted to the maximum valid value
	* for the new month and year.
	* <li>{@code YEAR_OF_ERA} -
	* Returns a {@code LocalDate} with the specified year-of-era.
	* The era and month will be unchanged. The day-of-month will also be unchanged,
	* unless it would be invalid for the new month and year. In that case, the
	* day-of-month is adjusted to the maximum valid value for the new month and year.
	* <li>{@code YEAR} -
	* Returns a {@code LocalDate} with the specified year.
	* The month will be unchanged. The day-of-month will also be unchanged,
	* unless it would be invalid for the new month and year. In that case, the
	* day-of-month is adjusted to the maximum valid value for the new month and year.
	* <li>{@code ERA} -
	* Returns a {@code LocalDate} with the specified era.
	* The year-of-era and month will be unchanged. The day-of-month will also be unchanged,
	* unless it would be invalid for the new month and year. In that case, the
	* day-of-month is adjusted to the maximum valid value for the new month and year.
	* </ul>
	* <p>
	* In all cases, if the new value is outside the valid range of values for the field
	* then a {@code DateTimeException} will be thrown.
	* <p>
	* All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.
	* <p>
	* If the field is not a {@code ChronoField}, then the result of this method
	* is obtained by invoking {@code TemporalField.adjustInto(Temporal, long)}
	* passing {@code this} as the argument. In this case, the field determines
	* whether and how to adjust the instant.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param field the field to set in the result, not null
	* @param newValue the new value of the field in the result
	* @return a {@code LocalDate} based on {@code this} with the specified field set, not null
	* @throws DateTimeException if the field cannot be set
	* @throws UnsupportedTemporalTypeException if the field is not supported
	* @throws ArithmeticException if numeric overflow occurs
	*/
	@Override
	public LocalDate with(TemporalField field, long newValue) {
	if (field instanceof ChronoField) {
	ChronoField f = (ChronoField) field;
	f.checkValidValue(newValue);
	switch (f) {
	case DAY_OF_WEEK: return plusDays(newValue - getDayOfWeek().getValue());
	case ALIGNED_DAY_OF_WEEK_IN_MONTH: return plusDays(newValue - getLong(ALIGNED_DAY_OF_WEEK_IN_MONTH));
	case ALIGNED_DAY_OF_WEEK_IN_YEAR: return plusDays(newValue - getLong(ALIGNED_DAY_OF_WEEK_IN_YEAR));
	case DAY_OF_MONTH: return withDayOfMonth((int) newValue);
	case DAY_OF_YEAR: return withDayOfYear((int) newValue);
	case EPOCH_DAY: return LocalDate.ofEpochDay(newValue);
	case ALIGNED_WEEK_OF_MONTH: return plusWeeks(newValue - getLong(ALIGNED_WEEK_OF_MONTH));
	case ALIGNED_WEEK_OF_YEAR: return plusWeeks(newValue - getLong(ALIGNED_WEEK_OF_YEAR));
	case MONTH_OF_YEAR: return withMonth((int) newValue);
	case PROLEPTIC_MONTH: return plusMonths(newValue - getProlepticMonth());
	case YEAR_OF_ERA: return withYear((int) (year >= 1 ? newValue : 1 - newValue));
	case YEAR: return withYear((int) newValue);
	case ERA: return (getLong(ERA) == newValue ? this : withYear(1 - year));
	}
	throw new UnsupportedTemporalTypeException("Unsupported field: " + field);
	}
	return field.adjustInto(this, newValue);
	}

	//-----------------------------------------------------------------------
	/**
	* Returns a copy of this {@code LocalDate} with the year altered.
	* <p>
	* If the day-of-month is invalid for the year, it will be changed to the last valid day of the month.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param year the year to set in the result, from MIN_YEAR to MAX_YEAR
	* @return a {@code LocalDate} based on this date with the requested year, not null
	* @throws DateTimeException if the year value is invalid
	*/
	public LocalDate withYear(int year) {
	if (this.year == year) {
	return this;
	}
	YEAR.checkValidValue(year);
	return resolvePreviousValid(year, month, day);
	}

	/**
	* Returns a copy of this {@code LocalDate} with the month-of-year altered.
	* <p>
	* If the day-of-month is invalid for the year, it will be changed to the last valid day of the month.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param month the month-of-year to set in the result, from 1 (January) to 12 (December)
	* @return a {@code LocalDate} based on this date with the requested month, not null
	* @throws DateTimeException if the month-of-year value is invalid
	*/
	public LocalDate withMonth(int month) {
	if (this.month == month) {
	return this;
	}
	MONTH_OF_YEAR.checkValidValue(month);
	return resolvePreviousValid(year, month, day);
	}

	/**
	* Returns a copy of this {@code LocalDate} with the day-of-month altered.
	* <p>
	* If the resulting date is invalid, an exception is thrown.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param dayOfMonth the day-of-month to set in the result, from 1 to 28-31
	* @return a {@code LocalDate} based on this date with the requested day, not null
	* @throws DateTimeException if the day-of-month value is invalid,
	* or if the day-of-month is invalid for the month-year
	*/
	public LocalDate withDayOfMonth(int dayOfMonth) {
	if (this.day == dayOfMonth) {
	return this;
	}
	return of(year, month, dayOfMonth);
	}

	/**
	* Returns a copy of this {@code LocalDate} with the day-of-year altered.
	* <p>
	* If the resulting date is invalid, an exception is thrown.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param dayOfYear the day-of-year to set in the result, from 1 to 365-366
	* @return a {@code LocalDate} based on this date with the requested day, not null
	* @throws DateTimeException if the day-of-year value is invalid,
	* or if the day-of-year is invalid for the year
	*/
	public LocalDate withDayOfYear(int dayOfYear) {
	if (this.getDayOfYear() == dayOfYear) {
	return this;
	}
	return ofYearDay(year, dayOfYear);
	}

	//-----------------------------------------------------------------------
	/**
	* Returns a copy of this date with the specified amount added.
	* <p>
	* This returns a {@code LocalDate}, based on this one, with the specified amount added.
	* The amount is typically {@link Period} but may be any other type implementing
	* the {@link TemporalAmount} interface.
	* <p>
	* The calculation is delegated to the amount object by calling
	* {@link TemporalAmount#addTo(Temporal)}. The amount implementation is free
	* to implement the addition in any way it wishes, however it typically
	* calls back to {@link #plus(long, TemporalUnit)}. Consult the documentation
	* of the amount implementation to determine if it can be successfully added.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param amountToAdd the amount to add, not null
	* @return a {@code LocalDate} based on this date with the addition made, not null
	* @throws DateTimeException if the addition cannot be made
	* @throws ArithmeticException if numeric overflow occurs
	*/
	@Override
	public LocalDate plus(TemporalAmount amountToAdd) {
	if (amountToAdd instanceof Period) {
	Period periodToAdd = (Period) amountToAdd;
	return plusMonths(periodToAdd.toTotalMonths()).plusDays(periodToAdd.getDays());
	}
	Objects.requireNonNull(amountToAdd, "amountToAdd");
	return (LocalDate) amountToAdd.addTo(this);
	}

	/**
	* Returns a copy of this date with the specified amount added.
	* <p>
	* This returns a {@code LocalDate}, based on this one, with the amount
	* in terms of the unit added. If it is not possible to add the amount, because the
	* unit is not supported or for some other reason, an exception is thrown.
	* <p>
	* In some cases, adding the amount can cause the resulting date to become invalid.
	* For example, adding one month to 31st January would result in 31st February.
	* In cases like this, the unit is responsible for resolving the date.
	* Typically it will choose the previous valid date, which would be the last valid
	* day of February in this example.
	* <p>
	* If the field is a {@link ChronoUnit} then the addition is implemented here.
	* The supported fields behave as follows:
	* <ul>
	* <li>{@code DAYS} -
	* Returns a {@code LocalDate} with the specified number of days added.
	* This is equivalent to {@link #plusDays(long)}.
	* <li>{@code WEEKS} -
	* Returns a {@code LocalDate} with the specified number of weeks added.
	* This is equivalent to {@link #plusWeeks(long)} and uses a 7 day week.
	* <li>{@code MONTHS} -
	* Returns a {@code LocalDate} with the specified number of months added.
	* This is equivalent to {@link #plusMonths(long)}.
	* The day-of-month will be unchanged unless it would be invalid for the new
	* month and year. In that case, the day-of-month is adjusted to the maximum
	* valid value for the new month and year.
	* <li>{@code YEARS} -
	* Returns a {@code LocalDate} with the specified number of years added.
	* This is equivalent to {@link #plusYears(long)}.
	* The day-of-month will be unchanged unless it would be invalid for the new
	* month and year. In that case, the day-of-month is adjusted to the maximum
	* valid value for the new month and year.
	* <li>{@code DECADES} -
	* Returns a {@code LocalDate} with the specified number of decades added.
	* This is equivalent to calling {@link #plusYears(long)} with the amount
	* multiplied by 10.
	* The day-of-month will be unchanged unless it would be invalid for the new
	* month and year. In that case, the day-of-month is adjusted to the maximum
	* valid value for the new month and year.
	* <li>{@code CENTURIES} -
	* Returns a {@code LocalDate} with the specified number of centuries added.
	* This is equivalent to calling {@link #plusYears(long)} with the amount
	* multiplied by 100.
	* The day-of-month will be unchanged unless it would be invalid for the new
	* month and year. In that case, the day-of-month is adjusted to the maximum
	* valid value for the new month and year.
	* <li>{@code MILLENNIA} -
	* Returns a {@code LocalDate} with the specified number of millennia added.
	* This is equivalent to calling {@link #plusYears(long)} with the amount
	* multiplied by 1,000.
	* The day-of-month will be unchanged unless it would be invalid for the new
	* month and year. In that case, the day-of-month is adjusted to the maximum
	* valid value for the new month and year.
	* <li>{@code ERAS} -
	* Returns a {@code LocalDate} with the specified number of eras added.
	* Only two eras are supported so the amount must be one, zero or minus one.
	* If the amount is non-zero then the year is changed such that the year-of-era
	* is unchanged.
	* The day-of-month will be unchanged unless it would be invalid for the new
	* month and year. In that case, the day-of-month is adjusted to the maximum
	* valid value for the new month and year.
	* </ul>
	* <p>
	* All other {@code ChronoUnit} instances will throw an {@code UnsupportedTemporalTypeException}.
	* <p>
	* If the field is not a {@code ChronoUnit}, then the result of this method
	* is obtained by invoking {@code TemporalUnit.addTo(Temporal, long)}
	* passing {@code this} as the argument. In this case, the unit determines
	* whether and how to perform the addition.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param amountToAdd the amount of the unit to add to the result, may be negative
	* @param unit the unit of the amount to add, not null
	* @return a {@code LocalDate} based on this date with the specified amount added, not null
	* @throws DateTimeException if the addition cannot be made
	* @throws UnsupportedTemporalTypeException if the unit is not supported
	* @throws ArithmeticException if numeric overflow occurs
	*/
	@Override
	public LocalDate plus(long amountToAdd, TemporalUnit unit) {
	if (unit instanceof ChronoUnit) {
	ChronoUnit f = (ChronoUnit) unit;
	switch (f) {
	case DAYS: return plusDays(amountToAdd);
	case WEEKS: return plusWeeks(amountToAdd);
	case MONTHS: return plusMonths(amountToAdd);
	case YEARS: return plusYears(amountToAdd);
	case DECADES: return plusYears(Math.multiplyExact(amountToAdd, 10));
	case CENTURIES: return plusYears(Math.multiplyExact(amountToAdd, 100));
	case MILLENNIA: return plusYears(Math.multiplyExact(amountToAdd, 1000));
	case ERAS: return with(ERA, Math.addExact(getLong(ERA), amountToAdd));
	}
	throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit);
	}
	return unit.addTo(this, amountToAdd);
	}

	//-----------------------------------------------------------------------
	/**
	* Returns a copy of this {@code LocalDate} with the specified number of years added.
	* <p>
	* This method adds the specified amount to the years field in three steps:
	* <ol>
	* <li>Add the input years to the year field</li>
	* <li>Check if the resulting date would be invalid</li>
	* <li>Adjust the day-of-month to the last valid day if necessary</li>
	* </ol>
	* <p>
	* For example, 2008-02-29 (leap year) plus one year would result in the
	* invalid date 2009-02-29 (standard year). Instead of returning an invalid
	* result, the last valid day of the month, 2009-02-28, is selected instead.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param yearsToAdd the years to add, may be negative
	* @return a {@code LocalDate} based on this date with the years added, not null
	* @throws DateTimeException if the result exceeds the supported date range
	*/
	public LocalDate plusYears(long yearsToAdd) {
	if (yearsToAdd == 0) {
	return this;
	}
	int newYear = YEAR.checkValidIntValue(year + yearsToAdd); // safe overflow
	return resolvePreviousValid(newYear, month, day);
	}

	/**
	* Returns a copy of this {@code LocalDate} with the specified number of months added.
	* <p>
	* This method adds the specified amount to the months field in three steps:
	* <ol>
	* <li>Add the input months to the month-of-year field</li>
	* <li>Check if the resulting date would be invalid</li>
	* <li>Adjust the day-of-month to the last valid day if necessary</li>
	* </ol>
	* <p>
	* For example, 2007-03-31 plus one month would result in the invalid date
	* 2007-04-31. Instead of returning an invalid result, the last valid day
	* of the month, 2007-04-30, is selected instead.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param monthsToAdd the months to add, may be negative
	* @return a {@code LocalDate} based on this date with the months added, not null
	* @throws DateTimeException if the result exceeds the supported date range
	*/
	public LocalDate plusMonths(long monthsToAdd) {
	if (monthsToAdd == 0) {
	return this;
	}
	long monthCount = year * 12L + (month - 1);
	long calcMonths = monthCount + monthsToAdd; // safe overflow
	int newYear = YEAR.checkValidIntValue(Math.floorDiv(calcMonths, 12));
	int newMonth = (int)Math.floorMod(calcMonths, 12) + 1;
	return resolvePreviousValid(newYear, newMonth, day);
	}

	/**
	* Returns a copy of this {@code LocalDate} with the specified number of weeks added.
	* <p>
	* This method adds the specified amount in weeks to the days field incrementing
	* the month and year fields as necessary to ensure the result remains valid.
	* The result is only invalid if the maximum/minimum year is exceeded.
	* <p>
	* For example, 2008-12-31 plus one week would result in 2009-01-07.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param weeksToAdd the weeks to add, may be negative
	* @return a {@code LocalDate} based on this date with the weeks added, not null
	* @throws DateTimeException if the result exceeds the supported date range
	*/
	public LocalDate plusWeeks(long weeksToAdd) {
	return plusDays(Math.multiplyExact(weeksToAdd, 7));
	}

	/**
	* Returns a copy of this {@code LocalDate} with the specified number of days added.
	* <p>
	* This method adds the specified amount to the days field incrementing the
	* month and year fields as necessary to ensure the result remains valid.
	* The result is only invalid if the maximum/minimum year is exceeded.
	* <p>
	* For example, 2008-12-31 plus one day would result in 2009-01-01.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param daysToAdd the days to add, may be negative
	* @return a {@code LocalDate} based on this date with the days added, not null
	* @throws DateTimeException if the result exceeds the supported date range
	*/
	public LocalDate plusDays(long daysToAdd) {
	if (daysToAdd == 0) {
	return this;
	}
	long mjDay = Math.addExact(toEpochDay(), daysToAdd);
	return LocalDate.ofEpochDay(mjDay);
	}

	//-----------------------------------------------------------------------
	/**
	* Returns a copy of this date with the specified amount subtracted.
	* <p>
	* This returns a {@code LocalDate}, based on this one, with the specified amount subtracted.
	* The amount is typically {@link Period} but may be any other type implementing
	* the {@link TemporalAmount} interface.
	* <p>
	* The calculation is delegated to the amount object by calling
	* {@link TemporalAmount#subtractFrom(Temporal)}. The amount implementation is free
	* to implement the subtraction in any way it wishes, however it typically
	* calls back to {@link #minus(long, TemporalUnit)}. Consult the documentation
	* of the amount implementation to determine if it can be successfully subtracted.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param amountToSubtract the amount to subtract, not null
	* @return a {@code LocalDate} based on this date with the subtraction made, not null
	* @throws DateTimeException if the subtraction cannot be made
	* @throws ArithmeticException if numeric overflow occurs
	*/
	@Override
	public LocalDate minus(TemporalAmount amountToSubtract) {
	if (amountToSubtract instanceof Period) {
	Period periodToSubtract = (Period) amountToSubtract;
	return minusMonths(periodToSubtract.toTotalMonths()).minusDays(periodToSubtract.getDays());
	}
	Objects.requireNonNull(amountToSubtract, "amountToSubtract");
	return (LocalDate) amountToSubtract.subtractFrom(this);
	}

	/**
	* Returns a copy of this date with the specified amount subtracted.
	* <p>
	* This returns a {@code LocalDate}, based on this one, with the amount
	* in terms of the unit subtracted. If it is not possible to subtract the amount,
	* because the unit is not supported or for some other reason, an exception is thrown.
	* <p>
	* This method is equivalent to {@link #plus(long, TemporalUnit)} with the amount negated.
	* See that method for a full description of how addition, and thus subtraction, works.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param amountToSubtract the amount of the unit to subtract from the result, may be negative
	* @param unit the unit of the amount to subtract, not null
	* @return a {@code LocalDate} based on this date with the specified amount subtracted, not null
	* @throws DateTimeException if the subtraction cannot be made
	* @throws UnsupportedTemporalTypeException if the unit is not supported
	* @throws ArithmeticException if numeric overflow occurs
	*/
	@Override
	public LocalDate minus(long amountToSubtract, TemporalUnit unit) {
	return (amountToSubtract == Long.MIN_VALUE ? plus(Long.MAX_VALUE, unit).plus(1, unit) : plus(-amountToSubtract, unit));
	}

	//-----------------------------------------------------------------------
	/**
	* Returns a copy of this {@code LocalDate} with the specified number of years subtracted.
	* <p>
	* This method subtracts the specified amount from the years field in three steps:
	* <ol>
	* <li>Subtract the input years from the year field</li>
	* <li>Check if the resulting date would be invalid</li>
	* <li>Adjust the day-of-month to the last valid day if necessary</li>
	* </ol>
	* <p>
	* For example, 2008-02-29 (leap year) minus one year would result in the
	* invalid date 2007-02-29 (standard year). Instead of returning an invalid
	* result, the last valid day of the month, 2007-02-28, is selected instead.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param yearsToSubtract the years to subtract, may be negative
	* @return a {@code LocalDate} based on this date with the years subtracted, not null
	* @throws DateTimeException if the result exceeds the supported date range
	*/
	public LocalDate minusYears(long yearsToSubtract) {
	return (yearsToSubtract == Long.MIN_VALUE ? plusYears(Long.MAX_VALUE).plusYears(1) : plusYears(-yearsToSubtract));
	}

	/**
	* Returns a copy of this {@code LocalDate} with the specified number of months subtracted.
	* <p>
	* This method subtracts the specified amount from the months field in three steps:
	* <ol>
	* <li>Subtract the input months from the month-of-year field</li>
	* <li>Check if the resulting date would be invalid</li>
	* <li>Adjust the day-of-month to the last valid day if necessary</li>
	* </ol>
	* <p>
	* For example, 2007-03-31 minus one month would result in the invalid date
	* 2007-02-31. Instead of returning an invalid result, the last valid day
	* of the month, 2007-02-28, is selected instead.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param monthsToSubtract the months to subtract, may be negative
	* @return a {@code LocalDate} based on this date with the months subtracted, not null
	* @throws DateTimeException if the result exceeds the supported date range
	*/
	public LocalDate minusMonths(long monthsToSubtract) {
	return (monthsToSubtract == Long.MIN_VALUE ? plusMonths(Long.MAX_VALUE).plusMonths(1) : plusMonths(-monthsToSubtract));
	}

	/**
	* Returns a copy of this {@code LocalDate} with the specified number of weeks subtracted.
	* <p>
	* This method subtracts the specified amount in weeks from the days field decrementing
	* the month and year fields as necessary to ensure the result remains valid.
	* The result is only invalid if the maximum/minimum year is exceeded.
	* <p>
	* For example, 2009-01-07 minus one week would result in 2008-12-31.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param weeksToSubtract the weeks to subtract, may be negative
	* @return a {@code LocalDate} based on this date with the weeks subtracted, not null
	* @throws DateTimeException if the result exceeds the supported date range
	*/
	public LocalDate minusWeeks(long weeksToSubtract) {
	return (weeksToSubtract == Long.MIN_VALUE ? plusWeeks(Long.MAX_VALUE).plusWeeks(1) : plusWeeks(-weeksToSubtract));
	}

	/**
	* Returns a copy of this {@code LocalDate} with the specified number of days subtracted.
	* <p>
	* This method subtracts the specified amount from the days field decrementing the
	* month and year fields as necessary to ensure the result remains valid.
	* The result is only invalid if the maximum/minimum year is exceeded.
	* <p>
	* For example, 2009-01-01 minus one day would result in 2008-12-31.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param daysToSubtract the days to subtract, may be negative
	* @return a {@code LocalDate} based on this date with the days subtracted, not null
	* @throws DateTimeException if the result exceeds the supported date range
	*/
	public LocalDate minusDays(long daysToSubtract) {
	return (daysToSubtract == Long.MIN_VALUE ? plusDays(Long.MAX_VALUE).plusDays(1) : plusDays(-daysToSubtract));
	}

	//-----------------------------------------------------------------------
	/**
	* Queries this date using the specified query.
	* <p>
	* This queries this date using the specified query strategy object.
	* The {@code TemporalQuery} object defines the logic to be used to
	* obtain the result. Read the documentation of the query to understand
	* what the result of this method will be.
	* <p>
	* The result of this method is obtained by invoking the
	* {@link TemporalQuery#queryFrom(TemporalAccessor)} method on the
	* specified query passing {@code this} as the argument.
	*
	* @param <R> the type of the result
	* @param query the query to invoke, not null
	* @return the query result, null may be returned (defined by the query)
	* @throws DateTimeException if unable to query (defined by the query)
	* @throws ArithmeticException if numeric overflow occurs (defined by the query)
	*/
	@SuppressWarnings("unchecked")
	@Override
	public <R> R query(TemporalQuery<R> query) {
	if (query == TemporalQueries.localDate()) {
	return (R) this;
	}
	return ChronoLocalDate.super.query(query);
	}

	/**
	* Adjusts the specified temporal object to have the same date as this object.
	* <p>
	* This returns a temporal object of the same observable type as the input
	* with the date changed to be the same as this.
	* <p>
	* The adjustment is equivalent to using {@link Temporal#with(TemporalField, long)}
	* passing {@link ChronoField#EPOCH_DAY} as the field.
	* <p>
	* In most cases, it is clearer to reverse the calling pattern by using
	* {@link Temporal#with(TemporalAdjuster)}:
	* <pre>
	* // these two lines are equivalent, but the second approach is recommended
	* temporal = thisLocalDate.adjustInto(temporal);
	* temporal = temporal.with(thisLocalDate);
	* </pre>
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param temporal the target object to be adjusted, not null
	* @return the adjusted object, not null
	* @throws DateTimeException if unable to make the adjustment
	* @throws ArithmeticException if numeric overflow occurs
	*/
	@Override // override for Javadoc
	public Temporal adjustInto(Temporal temporal) {
	return ChronoLocalDate.super.adjustInto(temporal);
	}

	/**
	* Calculates the amount of time until another date in terms of the specified unit.
	* <p>
	* This calculates the amount of time between two {@code LocalDate}
	* objects in terms of a single {@code TemporalUnit}.
	* The start and end points are {@code this} and the specified date.
	* The result will be negative if the end is before the start.
	* The {@code Temporal} passed to this method is converted to a
	* {@code LocalDate} using {@link #from(TemporalAccessor)}.
	* For example, the amount in days between two dates can be calculated
	* using {@code startDate.until(endDate, DAYS)}.
	* <p>
	* The calculation returns a whole number, representing the number of
	* complete units between the two dates.
	* For example, the amount in months between 2012-06-15 and 2012-08-14
	* will only be one month as it is one day short of two months.
	* <p>
	* There are two equivalent ways of using this method.
	* The first is to invoke this method.
	* The second is to use {@link TemporalUnit#between(Temporal, Temporal)}:
	* <pre>
	* // these two lines are equivalent
	* amount = start.until(end, MONTHS);
	* amount = MONTHS.between(start, end);
	* </pre>
	* The choice should be made based on which makes the code more readable.
	* <p>
	* The calculation is implemented in this method for {@link ChronoUnit}.
	* The units {@code DAYS}, {@code WEEKS}, {@code MONTHS}, {@code YEARS},
	* {@code DECADES}, {@code CENTURIES}, {@code MILLENNIA} and {@code ERAS}
	* are supported. Other {@code ChronoUnit} values will throw an exception.
	* <p>
	* If the unit is not a {@code ChronoUnit}, then the result of this method
	* is obtained by invoking {@code TemporalUnit.between(Temporal, Temporal)}
	* passing {@code this} as the first argument and the converted input temporal
	* as the second argument.
	* <p>
	* This instance is immutable and unaffected by this method call.
	*
	* @param endExclusive the end date, exclusive, which is converted to a {@code LocalDate}, not null
	* @param unit the unit to measure the amount in, not null
	* @return the amount of time between this date and the end date
	* @throws DateTimeException if the amount cannot be calculated, or the end
	* temporal cannot be converted to a {@code LocalDate}
	* @throws UnsupportedTemporalTypeException if the unit is not supported
	* @throws ArithmeticException if numeric overflow occurs
	*/
	@Override
	public long until(Temporal endExclusive, TemporalUnit unit) {
	LocalDate end = LocalDate.from(endExclusive);
	if (unit instanceof ChronoUnit) {
	switch ((ChronoUnit) unit) {
	case DAYS: return daysUntil(end);
	case WEEKS: return daysUntil(end) / 7;
	case MONTHS: return monthsUntil(end);
	case YEARS: return monthsUntil(end) / 12;
	case DECADES: return monthsUntil(end) / 120;
	case CENTURIES: return monthsUntil(end) / 1200;
	case MILLENNIA: return monthsUntil(end) / 12000;
	case ERAS: return end.getLong(ERA) - getLong(ERA);
	}
	throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit);
	}
	return unit.between(this, end);
	}

	long daysUntil(LocalDate end) {
	return end.toEpochDay() - toEpochDay(); // no overflow
	}

	private long monthsUntil(LocalDate end) {
	long packed1 = getProlepticMonth() * 32L + getDayOfMonth(); // no overflow
	long packed2 = end.getProlepticMonth() * 32L + end.getDayOfMonth(); // no overflow
	return (packed2 - packed1) / 32;
	}

	/**
	* Calculates the period between this date and another date as a {@code Period}.
	* <p>
	* This calculates the period between two dates in terms of years, months and days.
	* The start and end points are {@code this} and the specified date.
	* The result will be negative if the end is before the start.
	* The negative sign will be the same in each of year, month and day.
	* <p>
	* The calculation is performed using the ISO calendar system.
	* If necessary, the input date will be converted to ISO.
	* <p>
	* The start date is included, but the end date is not.
	* The period is calculated by removing complete months, then calculating
	* the remaining number of days, adjusting to ensure that both have the same sign.
	* The number of months is then normalized into years and months based on a 12 month year.
	* A month is considered to be complete if the end day-of-month is greater
	* than or equal to the start day-of-month.
	* For example, from {@code 2010-01-15} to {@code 2011-03-18} is "1 year, 2 months and 3 days".
	* <p>
	* There are two equivalent ways of using this method.
	* The first is to invoke this method.
	* The second is to use {@link Period#between(LocalDate, LocalDate)}:
	* <pre>
	* // these two lines are equivalent
	* period = start.until(end);
	* period = Period.between(start, end);
	* </pre>
	* The choice should be made based on which makes the code more readable.
	*
	* @param endDateExclusive the end date, exclusive, which may be in any chronology, not null
	* @return the period between this date and the end date, not null
	*/
	@Override
	public Period until(ChronoLocalDate endDateExclusive) {
	LocalDate end = LocalDate.from(endDateExclusive);
	long totalMonths = end.getProlepticMonth() - this.getProlepticMonth(); // safe
	int days = end.day - this.day;
	if (totalMonths > 0 && days < 0) {
	totalMonths--;
	LocalDate calcDate = this.plusMonths(totalMonths);
	days = (int) (end.toEpochDay() - calcDate.toEpochDay()); // safe
	} else if (totalMonths < 0 && days > 0) {
	totalMonths++;
	days -= end.lengthOfMonth();
	}
	long years = totalMonths / 12; // safe
	int months = (int) (totalMonths % 12); // safe
	return Period.of(Math.toIntExact(years), months, days);
	}

	/**
	* Formats this date using the specified formatter.
	* <p>
	* This date will be passed to the formatter to produce a string.
	*
	* @param formatter the formatter to use, not null
	* @return the formatted date string, not null
	* @throws DateTimeException if an error occurs during printing
	*/
	@Override // override for Javadoc and performance
	public String format(DateTimeFormatter formatter) {
	Objects.requireNonNull(formatter, "formatter");
	return formatter.format(this);
	}

	//-----------------------------------------------------------------------
	/**
	* Combines this date with a time to create a {@code LocalDateTime}.
	* <p>
	* This returns a {@code LocalDateTime} formed from this date at the specified time.
	* All possible combinations of date and time are valid.
	*
	* @param time the time to combine with, not null
	* @return the local date-time formed from this date and the specified time, not null
	*/
	@Override
	public LocalDateTime atTime(LocalTime time) {
	return LocalDateTime.of(this, time);
	}

	/**
	* Combines this date with a time to create a {@code LocalDateTime}.
	* <p>
	* This returns a {@code LocalDateTime} formed from this date at the
	* specified hour and minute.
	* The seconds and nanosecond fields will be set to zero.
	* The individual time fields must be within their valid range.
	* All possible combinations of date and time are valid.
	*
	* @param hour the hour-of-day to use, from 0 to 23
	* @param minute the minute-of-hour to use, from 0 to 59
	* @return the local date-time formed from this date and the specified time, not null
	* @throws DateTimeException if the value of any field is out of range
	*/
	public LocalDateTime atTime(int hour, int minute) {
	return atTime(LocalTime.of(hour, minute));
	}

	/**
	* Combines this date with a time to create a {@code LocalDateTime}.
	* <p>
	* This returns a {@code LocalDateTime} formed from this date at the
	* specified hour, minute and second.
	* The nanosecond field will be set to zero.
	* The individual time fields must be within their valid range.
	* All possible combinations of date and time are valid.
	*
	* @param hour the hour-of-day to use, from 0 to 23
	* @param minute the minute-of-hour to use, from 0 to 59
	* @param second the second-of-minute to represent, from 0 to 59
	* @return the local date-time formed from this date and the specified time, not null
	* @throws DateTimeException if the value of any field is out of range
	*/
	public LocalDateTime atTime(int hour, int minute, int second) {
	return atTime(LocalTime.of(hour, minute, second));
	}

	/**
	* Combines this date with a time to create a {@code LocalDateTime}.
	* <p>
	* This returns a {@code LocalDateTime} formed from this date at the
	* specified hour, minute, second and nanosecond.
	* The individual time fields must be within their valid range.
	* All possible combinations of date and time are valid.
	*
	* @param hour the hour-of-day to use, from 0 to 23
	* @param minute the minute-of-hour to use, from 0 to 59
	* @param second the second-of-minute to represent, from 0 to 59
	* @param nanoOfSecond the nano-of-second to represent, from 0 to 999,999,999
	* @return the local date-time formed from this date and the specified time, not null
	* @throws DateTimeException if the value of any field is out of range
	*/
	public LocalDateTime atTime(int hour, int minute, int second, int nanoOfSecond) {
	return atTime(LocalTime.of(hour, minute, second, nanoOfSecond));
	}

	/**
	* Combines this date with an offset time to create an {@code OffsetDateTime}.
	* <p>
	* This returns an {@code OffsetDateTime} formed from this date at the specified time.
	* All possible combinations of date and time are valid.
	*
	* @param time the time to combine with, not null
	* @return the offset date-time formed from this date and the specified time, not null
	*/
	public OffsetDateTime atTime(OffsetTime time) {
	return OffsetDateTime.of(LocalDateTime.of(this, time.toLocalTime()), time.getOffset());
	}

	/**
	* Combines this date with the time of midnight to create a {@code LocalDateTime}
	* at the start of this date.
	* <p>
	* This returns a {@code LocalDateTime} formed from this date at the time of
	* midnight, 00:00, at the start of this date.
	*
	* @return the local date-time of midnight at the start of this date, not null
	*/
	public LocalDateTime atStartOfDay() {
	return LocalDateTime.of(this, LocalTime.MIDNIGHT);
	}

	/**
	* Returns a zoned date-time from this date at the earliest valid time according
	* to the rules in the time-zone.
	* <p>
	* Time-zone rules, such as daylight savings, mean that not every local date-time
	* is valid for the specified zone, thus the local date-time may not be midnight.
	* <p>
	* In most cases, there is only one valid offset for a local date-time.
	* In the case of an overlap, there are two valid offsets, and the earlier one is used,
	* corresponding to the first occurrence of midnight on the date.
	* In the case of a gap, the zoned date-time will represent the instant just after the gap.
	* <p>
	* If the zone ID is a {@link ZoneOffset}, then the result always has a time of midnight.
	* <p>
	* To convert to a specific time in a given time-zone call {@link #atTime(LocalTime)}
	* followed by {@link LocalDateTime#atZone(ZoneId)}.
	*
	* @param zone the zone ID to use, not null
	* @return the zoned date-time formed from this date and the earliest valid time for the zone, not null
	*/
	public ZonedDateTime atStartOfDay(ZoneId zone) {
	Objects.requireNonNull(zone, "zone");
	// need to handle case where there is a gap from 11:30 to 00:30
	// standard ZDT factory would result in 01:00 rather than 00:30
	LocalDateTime ldt = atTime(LocalTime.MIDNIGHT);
	if (zone instanceof ZoneOffset == false) {
	ZoneRules rules = zone.getRules();
	ZoneOffsetTransition trans = rules.getTransition(ldt);
	if (trans != null && trans.isGap()) {
	ldt = trans.getDateTimeAfter();
	}
	}
	return ZonedDateTime.of(ldt, zone);
	}

	//-----------------------------------------------------------------------
	@Override
	public long toEpochDay() {
	long y = year;
	long m = month;
	long total = 0;
	total += 365 * y;
	if (y >= 0) {
	total += (y + 3) / 4 - (y + 99) / 100 + (y + 399) / 400;
	} else {
	total -= y / -4 - y / -100 + y / -400;
	}
	total += ((367 * m - 362) / 12);
	total += day - 1;
	if (m > 2) {
	total--;
	if (isLeapYear() == false) {
	total--;
	}
	}
	return total - DAYS_0000_TO_1970;
	}

	//-----------------------------------------------------------------------
	/**
	* Compares this date to another date.
	* <p>
	* The comparison is primarily based on the date, from earliest to latest.
	* It is "consistent with equals", as defined by {@link Comparable}.
	* <p>
	* If all the dates being compared are instances of {@code LocalDate},
	* then the comparison will be entirely based on the date.
	* If some dates being compared are in different chronologies, then the
	* chronology is also considered, see {@link java.time.chrono.ChronoLocalDate#compareTo}.
	*
	* @param other the other date to compare to, not null
	* @return the comparator value, negative if less, positive if greater
	*/
	@Override // override for Javadoc and performance
	public int compareTo(ChronoLocalDate other) {
	if (other instanceof LocalDate) {
	return compareTo0((LocalDate) other);
	}
	return ChronoLocalDate.super.compareTo(other);
	}

	int compareTo0(LocalDate otherDate) {
	int cmp = (year - otherDate.year);
	if (cmp == 0) {
	cmp = (month - otherDate.month);
	if (cmp == 0) {
	cmp = (day - otherDate.day);
	}
	}
	return cmp;
	}

	/**
	* Checks if this date is after the specified date.
	* <p>
	* This checks to see if this date represents a point on the
	* local time-line after the other date.
	* <pre>
	* LocalDate a = LocalDate.of(2012, 6, 30);
	* LocalDate b = LocalDate.of(2012, 7, 1);
	* a.isAfter(b) == false
	* a.isAfter(a) == false
	* b.isAfter(a) == true
	* </pre>
	* <p>
	* This method only considers the position of the two dates on the local time-line.
	* It does not take into account the chronology, or calendar system.
	* This is different from the comparison in {@link #compareTo(ChronoLocalDate)},
	* but is the same approach as {@link ChronoLocalDate#timeLineOrder()}.
	*
	* @param other the other date to compare to, not null
	* @return true if this date is after the specified date
	*/
	@Override // override for Javadoc and performance
	public boolean isAfter(ChronoLocalDate other) {
	if (other instanceof LocalDate) {
	return compareTo0((LocalDate) other) > 0;
	}
	return ChronoLocalDate.super.isAfter(other);
	}

	/**
	* Checks if this date is before the specified date.
	* <p>
	* This checks to see if this date represents a point on the
	* local time-line before the other date.
	* <pre>
	* LocalDate a = LocalDate.of(2012, 6, 30);
	* LocalDate b = LocalDate.of(2012, 7, 1);
	* a.isBefore(b) == true
	* a.isBefore(a) == false
	* b.isBefore(a) == false
	* </pre>
	* <p>
	* This method only considers the position of the two dates on the local time-line.
	* It does not take into account the chronology, or calendar system.
	* This is different from the comparison in {@link #compareTo(ChronoLocalDate)},
	* but is the same approach as {@link ChronoLocalDate#timeLineOrder()}.
	*
	* @param other the other date to compare to, not null
	* @return true if this date is before the specified date
	*/
	@Override // override for Javadoc and performance
	public boolean isBefore(ChronoLocalDate other) {
	if (other instanceof LocalDate) {
	return compareTo0((LocalDate) other) < 0;
	}
	return ChronoLocalDate.super.isBefore(other);
	}

	/**
	* Checks if this date is equal to the specified date.
	* <p>
	* This checks to see if this date represents the same point on the
	* local time-line as the other date.
	* <pre>
	* LocalDate a = LocalDate.of(2012, 6, 30);
	* LocalDate b = LocalDate.of(2012, 7, 1);
	* a.isEqual(b) == false
	* a.isEqual(a) == true
	* b.isEqual(a) == false
	* </pre>
	* <p>
	* This method only considers the position of the two dates on the local time-line.
	* It does not take into account the chronology, or calendar system.
	* This is different from the comparison in {@link #compareTo(ChronoLocalDate)}
	* but is the same approach as {@link ChronoLocalDate#timeLineOrder()}.
	*
	* @param other the other date to compare to, not null
	* @return true if this date is equal to the specified date
	*/
	@Override // override for Javadoc and performance
	public boolean isEqual(ChronoLocalDate other) {
	if (other instanceof LocalDate) {
	return compareTo0((LocalDate) other) == 0;
	}
	return ChronoLocalDate.super.isEqual(other);
	}

	//-----------------------------------------------------------------------
	/**
	* Checks if this date is equal to another date.
	* <p>
	* Compares this {@code LocalDate} with another ensuring that the date is the same.
	* <p>
	* Only objects of type {@code LocalDate} are compared, other types return false.
	* To compare the dates of two {@code TemporalAccessor} instances, including dates
	* in two different chronologies, use {@link ChronoField#EPOCH_DAY} as a comparator.
	*
	* @param obj the object to check, null returns false
	* @return true if this is equal to the other date
	*/
	@Override
	public boolean equals(Object obj) {
	if (this == obj) {
	return true;
	}
	if (obj instanceof LocalDate) {
	return compareTo0((LocalDate) obj) == 0;
	}
	return false;
	}

	/**
	* A hash code for this date.
	*
	* @return a suitable hash code
	*/
	@Override
	public int hashCode() {
	int yearValue = year;
	int monthValue = month;
	int dayValue = day;
	return (yearValue & 0xFFFFF800) ^ ((yearValue << 11) + (monthValue << 6) + (dayValue));
	}

	//-----------------------------------------------------------------------
	/**
	* Outputs this date as a {@code String}, such as {@code 2007-12-03}.
	* <p>
	* The output will be in the ISO-8601 format {@code uuuu-MM-dd}.
	*
	* @return a string representation of this date, not null
	*/
	@Override
	public String toString() {
	int yearValue = year;
	int monthValue = month;
	int dayValue = day;
	int absYear = Math.abs(yearValue);
	StringBuilder buf = new StringBuilder(10);
	if (absYear < 1000) {
	if (yearValue < 0) {
	buf.append(yearValue - 10000).deleteCharAt(1);
	} else {
	buf.append(yearValue + 10000).deleteCharAt(0);
	}
	} else {
	if (yearValue > 9999) {
	buf.append('+');
	}
	buf.append(yearValue);
	}
	return buf.append(monthValue < 10 ? "-0" : "-")
	.append(monthValue)
	.append(dayValue < 10 ? "-0" : "-")
	.append(dayValue)
	.toString();
	}

	//-----------------------------------------------------------------------
	/**
	* Writes the object using a
	* <a href="../../serialized-form.html#java.time.Ser">dedicated serialized form</a>.
	* @serialData
	* <pre>
	* out.writeByte(3); // identifies a LocalDate
	* out.writeInt(year);
	* out.writeByte(month);
	* out.writeByte(day);
	* </pre>
	*
	* @return the instance of {@code Ser}, not null
	*/
	private Object writeReplace() {
	return new Ser(Ser.LOCAL_DATE_TYPE, this);
	}

	/**
	* Defend against malicious streams.
	*
	* @param s the stream to read
	* @throws InvalidObjectException always
	*/
	private void readObject(ObjectInputStream s) throws InvalidObjectException {
	throw new InvalidObjectException("Deserialization via serialization delegate");
	}

	void writeExternal(DataOutput out) throws IOException {
	out.writeInt(year);
	out.writeByte(month);
	out.writeByte(day);
	}

	static LocalDate readExternal(DataInput in) throws IOException {
	int year = in.readInt();
	int month = in.readByte();
	int dayOfMonth = in.readByte();
	return LocalDate.of(year, month, dayOfMonth);
	}

	}

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