API archive entry · source-reported
Hebrew Calendar
Convert between Gregorian and Hebrew, fetch Shabbat and Holiday times, etc
Other Calendar APIs
These records share a directory category and are ordered by similarity of reported access facts. They are a shortlist, not proof of drop-in compatibility.
Church Calendar
Catholic liturgical calendar
No auth · HTTPS unconfirmed · CORS Unknown
Czech Namedays Calendar
Lookup for a name and returns nameday date
No auth · HTTPS unconfirmed · CORS Unknown
LectServe
Protestant liturgical calendar
No auth · HTTPS unconfirmed · CORS Unknown
Non-Working Days
Database of ICS files for non working days
No auth · HTTPS reported · CORS Unknown
UK Bank Holidays
Bank holidays in England and Wales, Scotland and Northern Ireland
No auth · HTTPS reported · CORS Unknown
caldays
Public holidays for 195+ countries
No auth · HTTPS reported · CORS Yes
How to compare them
Coverage
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Operating cost
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Integration risk
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Data rights
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Source reference
This page separates source-reported facts from questions that need live provider verification.