kosher_dart

Package Overview

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Kosher Dart is a Dart library designed to calculate Jewish zmanim—halachic times—for religious observances such as prayers, Shabbat, and holidays. It provides accurate astronomical calculations based on location and date, supporting traditional Jewish timekeeping methods. The library is suitable for apps requiring precise timing for daily rituals and religious events. It works across all major platforms, including mobile, web, and desktop. Ideal for developers building Jewish calendar or prayer time applications.

Use cases

Prayer time reminders
Shabbat candle lighting calculators
Jewish holiday scheduling
Religious app integrations
Calendar-based ritual planning

Key features

Accurate halachic time calculations
Support for multiple zmanim types
Location-based time adjustments
Cross-platform compatibility
Easy integration with Flutter apps

Suitable for

Jewish calendar apps
Spiritual wellness tools
Religious education platforms
Daily prayer reminder apps
Mobile apps for Jewish observance

Considerations

Requires accurate geographic coordinates
Depends on correct date input
May need localization for non-Hebrew users
Results vary by minyan and custom settings
Not intended for legal or official halachic rulings

Original README

Original README snapshot from the linked source repository. Visit the repository for the latest content.

kosher_dart API

This 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 dutuies. This API Translated KosherJava Zmanim API from JAVA to Dart language.

License

The library is released under the LGPL 2.1 license.

Getting Started

Add this to your package's pubspec.yaml file:

dependencies:
  kosher_dart: ^2.0.20

Usage

Import the package

To use this plugin, follow the plugin installation instructions.

Use the plugin

Add the following import to your Dart code:

import 'package:kosher_dart/kosher_dart.dart';

Get Hebrew date

  JewishDate jewishDate = JewishDate();
  HebrewDateFormatter hebrewDateFormatter = HebrewDateFormatter();
  hebrewDateFormatter.hebrewFormat = true; // optional
  hebrewDateFormatter.useGershGershayim = true; // optional
  String hebrewDate = hebrewDateFormatter.format(jewishDate);

Get jewish holiday

  JewishCalendar jewishCalendar = JewishCalendar();
  HebrewDateFormatter hebrewDateFormatter = HebrewDateFormatter();
  
  jewishCalendar.inIsrael = true; // set to true if your location is in israel
  hebrewDateFormatter.hebrewFormat = true; // optional
  hebrewDateFormatter.useGershGershayim = true; // optional
  
  String yomTov = hebrewDateFormatter.formatYomTov(jewishCalendar);

Get time of the day

  GeoLocation geoLocation = GeoLocation.setLocation(
        'Jerusalem', 31.7962419, 35.2453988, DateTime.now());
    ComplexZmanimCalendar complexZmanimCalendar = ComplexZmanimCalendar.intGeoLocation(geoLocation);
    DateTime? sofZmanTfila = complexZmanimCalendar.getSofZmanTfilaGRA();
    DateTime? minchaKetana = complexZmanimCalendar.getMinchaKetana();

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