Class EthiopicCalendar

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.GregorianCalendar

org.episteme.social.history.calendars.JulianCalendar

org.episteme.social.history.calendars.CopticCalendar

org.episteme.social.history.calendars.EthiopicCalendar

All Implemented Interfaces:

Serializable

public class EthiopicCalendar
extends CopticCalendar

Implementation of the Ethiopian calendar. The Ethiopian calendar is based on the Coptic calendar and is the official calendar of Ethiopia. It has 13 months - 12 of 30 days and one of 5-6 days.

Key features:

• Epoch: August 29, 8 CE (Julian)
• 13 months: 12 months of 30 days + Paguemen (5 or 6 days)
• 7-8 years behind the Gregorian calendar

* @version 2.0

Since:

1.0

Author:

Silvere Martin-Michiellot, Gemini AI (Google DeepMind)

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static long	EPOCH	The RD number of the Ethiopian epoch (August 29, 8 CE Julian).

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

Method Summary

Modifier and Type	Method	Description
Enumeration<String>	getMonths()	Returns an enumeration of all Ethiopian month names.
static void	main(String[] args)	Main method for testing the Ethiopian calendar implementation.
protected String	monthName()	Returns the name of the current month.
protected void	recomputeFromRD()	Recomputes the month, day, and year from the current Rata Die number.
protected void	recomputeRD()	Recomputes the Rata Die number from the current month, day, and year.

Methods inherited from class CopticCalendar

getSuffix, isLeapYear, toString

Methods inherited from class JulianCalendar

set

Methods inherited from class GregorianCalendar

dayNumber, daysLeft

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

EPOCH

public static long EPOCH

The RD number of the Ethiopian epoch (August 29, 8 CE Julian).

Constructor Details

EthiopicCalendar

public EthiopicCalendar()

Creates a new EthiopicCalendar object.

EthiopicCalendar

public EthiopicCalendar(long l)

Creates a new EthiopicCalendar object.

Parameters:

l - the Rata Die number.

EthiopicCalendar

public EthiopicCalendar(AlternateCalendar altcalendar)

Creates a new EthiopicCalendar object.

Parameters:

altcalendar - another calendar to initialize from.

EthiopicCalendar

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

Creates a new EthiopicCalendar object.

Parameters:

i - the month (1-13).

j - the day.

k - the year.

Method Details

recomputeRD

protected void recomputeRD()

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

Overrides:

recomputeRD in class CopticCalendar

recomputeFromRD

protected void recomputeFromRD()

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

Overrides:

recomputeFromRD in class CopticCalendar

monthName

protected String monthName()

Returns the name of the current month.

Overrides:

monthName in class CopticCalendar

Returns:

the month name string.

getMonths

public Enumeration<String> getMonths()

Returns an enumeration of all Ethiopian month names.

Overrides:

getMonths in class CopticCalendar

Returns:

enumeration of month names.

main

public static void main(String[] args)

Main method for testing the Ethiopian calendar implementation.

Parameters:

args - command line arguments.