hdate
Jewish/Hebrew date and Zmanim in native Python 2.7/3.x
Decision gist · record as of 2026-08-14
Yes. The package is actively maintained, production-stable, has low install friction, and fills a specific niche for Hebrew date and Zmanim calculations. The copyleft GPL-3.0-or-later license requires careful review if you plan to distribute proprietary software, but is standard for this type of library. No known security vulnerabilities.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.10 or later.
- Low friction installation with a single runtime dependency (num2words).
- Actively maintained with recent commits and marked as production-stable; last release was 117 days ago.
License · maintenance · safety
GPL-3.0-or-later (copyleft) — Licensed under GPL-3.0-or-later (copyleft). Any code that links or distributes this library must be made available under compatible open-source terms; proprietary or closed-source projects should review compatibility before use.
last release 2026-04-19 (117 days) · last repo commit 2026-04-19 · 41 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 81,259 downloads/mo, #14,239 on PyPI
Alternatives
Verify before relying
import hdate
import datetime
c = hdate.Location("פתח תקוה", 32.08707, 34.88747, "Asia/Jerusalem", 54)
z = hdate.Zmanim(date=datetime.date(2016, 4, 18), location=c)
print(z)
h = hdate.HDateInfo(datetime.date(2016, 4, 18))
print(h)- Accuracy of Zmanim calculations relative to other Jewish calendar libraries or authoritative sources.
- Performance characteristics when computing times for many dates or locations in sequence.
- Whether the library handles edge cases like dates near the Arctic Circle or during polar day/night.
What it is and what it does
hdate is a Python library that converts Gregorian dates to the Hebrew calendar and calculates Zmanim—the precise times of Jewish prayer services and daily events based on solar position and location. It wraps the C library libhdate and serves as the backend for Home Assistant's Jewish Calendar integration.
The library takes a Gregorian date and a geographic location (latitude, longitude, timezone, elevation) and returns Hebrew date information in multiple languages plus detailed prayer times. It handles both the calendar conversion and astronomical calculations needed for accurate Zmanim, making it suitable for applications that need to display Hebrew dates or alert users to prayer times.
Use it for
- Display the Hebrew date and day of the week in a Jewish calendar or scheduling application.
- Calculate prayer times (Zmanim) for a synagogue or religious organization's schedule.
- Build a Hebrew calendar widget or integration for home automation or calendar software.
- Convert between Gregorian and Hebrew dates for historical or genealogical research.
- Provide multilingual Hebrew date output in applications serving Hebrew-speaking users.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
The package is actively maintained, production-stable, has low install friction, and fills a specific niche for Hebrew date and Zmanim calculations. The copyleft GPL-3.0-or-later license requires careful review if you plan to distribute proprietary software, but is standard for this type of library. No known security vulnerabilities.
Install
hdate on PyPI
Before you install
Low friction installation with a single runtime dependency (num2words). Actively maintained with recent commits and marked as production-stable; last release was 117 days ago.
Requires Python 3.10 or later.
License in practice
Licensed under GPL-3.0-or-later (copyleft). Any code that links or distributes this library must be made available under compatible open-source terms; proprietary or closed-source projects should review compatibility before use.
Quickstart
import hdate
import datetime
c = hdate.Location("פתח תקוה", 32.08707, 34.88747, "Asia/Jerusalem", 54)
z = hdate.Zmanim(date=datetime.date(2016, 4, 18), location=c)
print(z)
h = hdate.HDateInfo(datetime.date(2016, 4, 18))
print(h)Verify before relying
- Accuracy of Zmanim calculations relative to other Jewish calendar libraries or authoritative sources.
- Performance characteristics when computing times for many dates or locations in sequence.
- Whether the library handles edge cases like dates near the Arctic Circle or during polar day/night.
Package facts
| License | GPL-3.0-or-later copyleft |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 1 packagenum2words |
| Maintenance | Actively maintained 117 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 81,259 / month, #14,239 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableTopic :: Software Development :: Libraries |
Evidence: hdate-1.2.1-py3-none-any.whl
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See also pyluach · convertdate · hijri-converter · hijridate · pyCalverter · exchange_calendars · businesstimedelta · lunardate · zhdate