Package org.episteme.social.history.calendars

package org.episteme.social.history.calendars

Historical and alternate calendar systems for chronological calculations.

This package provides implementations of various historical and cultural calendar systems, allowing conversion between different chronological frameworks. Each calendar extends AlternateCalendar which provides common operations like addition, subtraction, and conversion to/from Julian Day and Rata Die representations.

Included Calendar Systems:

• Gregorian - The internationally accepted civil calendar
• Julian - The predecessor to the Gregorian calendar
• Islamic (Hijri) - The lunar calendar used in Muslim countries
• Hebrew (Jewish) - The lunisolar calendar for Jewish observances
• Chinese - The traditional lunisolar Chinese calendar
• Persian (Solar Hijri) - The solar calendar used in Iran and Afghanistan
• Coptic - Used by the Coptic Orthodox Church
• Ethiopian - The official calendar of Ethiopia
• French Republican - The decimal calendar of the French Revolution
• Bahá'í - The calendar of the Bahá'í Faith
• Mayan - The ancient Mesoamerican calendar system
• ISO - ISO 8601 week-date calendar

Original implementations based on code by Mark E. Shoulson.

Since:

1.0

Author:

Mark E. Shoulson (original implementations), Silvere Martin-Michiellot, Gemini AI (Google DeepMind)

Related Packages

Package	Description
org.episteme.social.history	- historical events, timelines, and chronology.
org.episteme.social.history.archeology	Provides classes and interfaces for archaeological research and analysis.
org.episteme.social.history.clock	Provides the org.episteme.social.history.time module.
org.episteme.social.history.loaders
org.episteme.social.history.time	Temporal coordinate and interval support for historical analysis.

Class	Description
AlternateCalendar	Abstract base class for alternate (non-Gregorian) calendar systems.
ArrayEnumeration<E>	An Enumeration implementation that wraps an array.
BahaiCalendar	Implementation of the Bahá'í (Badí') calendar.
CalendarCoordinate	A temporal coordinate based on an AlternateCalendar system.
ChineseCalendar	Implementation of the traditional Chinese lunisolar calendar.
CopticCalendar	Implementation of the Coptic calendar.
EthiopicCalendar	Implementation of the Ethiopian calendar.
FrenchCalendar	Implementation of the French Republican Calendar (astronomical version).
GregorianCalendar	Implementation of the proleptic Gregorian calendar.
HebrewCalendar	Implementation of the Hebrew (Jewish) calendar.
InconsistentDateException	Exception thrown when a calendar date is inconsistent or invalid.
IslamicCalendar	Implementation of the Islamic (Hijri) calendar using the tabular arithmetic method.
ISOCalendar	Implementation of the ISO 8601 week-date calendar.
JulianCalendar	Implementation of the proleptic Julian calendar.
MayanCalendar	Implementation of the Mayan calendar system.
ModifiedFrenchCalendar	Implementation of the French Republican Calendar (modified version).
ModifiedHinduLunarBRCalendar	Modified Hindu Lunar calendar using arbitrary-precision arithmetic.
ModifiedHinduLunarCalendar	Modified Hindu Lunar calendar using floating-point arithmetic.
ModifiedHinduSolarBRCalendar	Modified Hindu Solar calendar using arbitrary-precision arithmetic.
ModifiedHinduSolarCalendar	Modified Hindu Solar calendar using floating-point arithmetic.
Moment	Astronomical calculations for calendar systems.
MonthDayYear	Abstract base class for calendar systems that use a month-day-year date representation.
OldHinduLunarCalendar	Implementation of the Old Hindu Lunar calendar (Surya Siddhanta). * @version 2.1
OldHinduSolarCalendar	Implementation of the Old Hindu Solar calendar (Surya Siddhanta). * @version 2.1
PersianCalendar	Implementation of the Persian (Solar Hijri) calendar.
SevenDaysWeek	Abstract base class for calendar systems that use a seven-day week.