Hebrew Calendar Resources: Tools, Libraries, and APIs

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

GitHub: danielrosehill/Hebrew-Calendar-Resources

Python Libraries

• pyluach — Python package for Hebrew date conversions and calculations

• py-libhdate — Python bindings for libhdate, providing Hebrew calendar and zmanim

JavaScript / TypeScript Libraries

• jewish-date — JavaScript library for Hebrew date conversions

• hebcal-es6 — Modern ES6 JavaScript library for Hebrew calendar calculations

Java Libraries

• KosherJava Zmanim — Comprehensive Java library for calculating zmanim (halachic times)

Web Services and APIs

• 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

• hebcal-mcp — MCP server for Hebcal Hebrew calendar data

• zmanim-mcp-server — MCP server for zmanim (halachic times) calculations

Smart Home and Desktop Integrations

• 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

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