Class FrenchCalendar

java.lang.Object

org.episteme.social.history.calendars.AlternateCalendar

org.episteme.social.history.calendars.SevenDaysWeek

org.episteme.social.history.calendars.MonthDayYear

org.episteme.social.history.calendars.ModifiedFrenchCalendar

org.episteme.social.history.calendars.FrenchCalendar

All Implemented Interfaces:

Serializable

public class FrenchCalendar
extends ModifiedFrenchCalendar

Implementation of the French Republican Calendar (astronomical version). This version uses precise astronomical calculations for the autumnal equinox to determine the new year, as specified in the original decree.

Key features:

• Epoch: September 22, 1792 (Autumnal Equinox)
• New year begins on the autumnal equinox at Paris meridian
• 12 months of 30 days + 5-6 complementary days

Since:

1.0

Author:

Silvere Martin-Michiellot, Gemini AI (Google DeepMind)

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected static final double	TIMEZONE	Time zone offset for Paris meridian in minutes.
protected static final double	TROPYEAR	Length of the tropical year in days.

Fields inherited from class ModifiedFrenchCalendar

DAYS, EPOCH, JOURS

Fields inherited from class MonthDayYear

day, month, year

Fields inherited from class SevenDaysWeek

DAY_NAMES, FRIDAY, MONDAY, SATURDAY, SUNDAY, THURSDAY, TUESDAY, WEDNESDAY

Fields inherited from class AlternateCalendar

JD_EPOCH, rd, unicode

Constructor Summary

Constructors

Constructor	Description
FrenchCalendar()	Creates a new FrenchCalendar object.
FrenchCalendar(int i, int j, int k)	Creates a new FrenchCalendar object.
FrenchCalendar(long l)	Creates a new FrenchCalendar object.
FrenchCalendar(AlternateCalendar altcalendar)	Creates a new FrenchCalendar object.

Method Summary

Modifier and Type	Method	Description
static void	main(String[] args)	Main method for testing the French calendar implementation.
void	recomputeFromRD()	Recomputes the month, day, and year from the current Rata Die number.
void	recomputeRD()	Recomputes the Rata Die number from the current month, day, and year.

Methods inherited from class ModifiedFrenchCalendar

getDecade, getMonths, getSuffix, getWeekDay, isLeapYear, monthName, set, toString

Methods inherited from class MonthDayYear

getDay, getMonth, getYear, set

Methods inherited from class SevenDaysWeek

kDayAfter, kDayBefore, kDayNearest, kDayOnOrAfter, kDayOnOrBefore, nthKDay, weekDay, weekDayName

Methods inherited from class AlternateCalendar

add, amod, difference, difference, floorDiv, fromJD, isAfter, isBefore, mod, mod, subtract, toJD, toJD, toRD

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

TIMEZONE

protected static final double TIMEZONE

Time zone offset for Paris meridian in minutes.

See Also:

• Constant Field Values

TROPYEAR

protected static final double TROPYEAR

Length of the tropical year in days.

See Also:

• Constant Field Values

Constructor Details

FrenchCalendar

public FrenchCalendar()

Creates a new FrenchCalendar object.

FrenchCalendar

public FrenchCalendar(long l)

Creates a new FrenchCalendar object.

Parameters:

l - the Rata Die number.

FrenchCalendar

public FrenchCalendar(int i,
 int j,
 int k)

Creates a new FrenchCalendar object.

Parameters:

i - the month (1-13).

j - the day (1-30).

k - the year.

FrenchCalendar

public FrenchCalendar(AlternateCalendar altcalendar)

Creates a new FrenchCalendar object.

Parameters:

altcalendar - another calendar to initialize from.

Method Details

recomputeRD

public void recomputeRD()

Recomputes the Rata Die number from the current month, day, and year.

Overrides:

recomputeRD in class ModifiedFrenchCalendar

recomputeFromRD

public void recomputeFromRD()

Recomputes the month, day, and year from the current Rata Die number.

Overrides:

recomputeFromRD in class ModifiedFrenchCalendar

main

public static void main(String[] args)

Main method for testing the French calendar implementation.

Parameters:

args - command line arguments.