Hebrew Calendar Resources

A curated list of open-source tools, libraries, APIs, and integrations for working with the Hebrew (Jewish) calendar, zmanim (halachic times), and related calculations.

Python Libraries

Project	Description
pyluach	Python package for Hebrew date conversions and calculations
py-libhdate	Python bindings for libhdate, providing Hebrew calendar and zmanim

JavaScript / TypeScript Libraries

Project	Description
jewish-date	JavaScript library for Hebrew date conversions
hebcal-es6	Modern ES6 JavaScript library for Hebrew calendar calculations by Hebcal

Java Libraries

Project	Description
KosherJava Zmanim	Comprehensive Java library for calculating zmanim (halachic times)

Web Services & APIs

Project	Description
Hebcal	Full-featured Hebrew calendar web service with holiday, parsha, and zmanim data
hebcal-rest-api	REST API for Hebcal's Hebrew calendar services
TorahCalc	Tools for biblical/Talmudic unit conversions, gematria, Hebrew calendar, and zmanim

MCP Servers

Project	Description
hebcal-mcp	MCP server for Hebcal Hebrew calendar data
zmanim-mcp-server	MCP server for zmanim (halachic times) calculations

Smart Home & Desktop Integrations

Project	Description
Home Assistant Jewish Calendar	Official Home Assistant integration for Jewish calendar sensors
MMM-HebrewCalendar	MagicMirror module for displaying the Hebrew calendar
Hebrew-Date-KDE-Widget	KDE Plasma widget displaying the current Hebrew date

Full-Stack Applications

Project	Description
myHebrewDates	Track and get reminders for Hebrew date anniversaries (yahrzeits, birthdays, etc.)

Contributing

Know of a Hebrew calendar resource that should be listed here? Open an issue or submit a pull request.

License

This resource list is provided under the CC0 1.0 Universal public domain dedication.