Hebrew Calendar vs LectServe

Hebcal converts between Gregorian and Hebrew dates and computes Shabbat start/end times, holiday dates, Torah readings, and the Daf Yomi study cycle for any location, driven by the same open-source engine (@hebcal/core) that runs the hebcal.com website. Every endpoint is keyless JSON (or RSS/iCal on other routes) under a Creative Commons Attribution 4.0 license, so results can be reused commercially as long as Hebcal is credited. It's rate-limited to keep the free service polite — no more than 90 requests per 10-second window — and the once-http-only backend now serves over HTTPS as well.

LectServe is a one-person hobby project publishing the daily and Sunday Revised Common/ACNA lectionary readings for Protestant and Anglican churches, with morning/evening prayer citations linked out to Bible Gateway. It answers in either shape depending on the path: /today and /date/YYYY-MM-DD return JSON, while a path like /html/daily/YYYY-MM-DD returns a full HTML page meant to be embedded or scraped — and there's no API key, rate limit, or pricing of any kind — it's maintained by its author, Michael Wayne Arnold, as a labor of love alongside his personal site.