Package com.kosherjava.zmanim

package com.kosherjava.zmanim

The KosherJava Zmanim library is an API for a specialized calendar that can calculate different astronomical times including sunrise and sunset and Jewish zmanim or religious times for prayers and other Jewish religious duties. The calendars are built on java.time: the date is set with setLocalDate(LocalDate), and zmanim are returned as Instants (or Durations for temporal hours / sha'os zmaniyos). For non-religious astronomical / solar calculations such as sunrise, sunset and twilight, use the AstronomicalCalendar. The ZmanimCalendar contains the most commonly used zmanim or religious time calculations. For a much more extensive list of zmanim use the ComprehensiveZmanimCalendar. Note: It is important to read the technical notes on top of the AstronomicalCalculator documentation.

Disclaimer:

I did my best to get accurate results using standardized astronomical calculations. Please use care when using the library since people rely on the zmanim calculations for halacha lemaaseh.

Author:

© Eliyahu Hershfeld 2004 - 2026

Related Packages

Package	Description
com.kosherjava.zmanim.hebrewcalendar	This package contains classes that represent a Jewish Date/Calendar, and allows conversion between Jewish and Gregorian dates.
com.kosherjava.zmanim.util	Utility classes for the Zmanim API, including classes to calculate sun-based times, location information and some formatting.

Class	Description
AstronomicalCalendar	A Java calendar that calculates astronomical times such as sunrise, sunset and twilight times.
AstronomicalCalendar.SolarEvent	An enum to indicate what type of solar event is being calculated.
ComprehensiveZmanimCalendar	This class extends ZmanimCalendar and provides many more zmanim than available in the ZmanimCalendar.
ZmanimCalendar	The ZmanimCalendar is a specialized calendar that can calculate sunrise, sunset and Jewish zmanim (religious times) for prayers and other Jewish religious duties.