API archive entry · source-reported
LectServe
Protestant liturgical calendar
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
Hebrew Calendar
Convert between Gregorian and Hebrew, fetch Shabbat and Holiday times, etc
No auth · HTTPS unconfirmed · CORS Unknown
Byabbe
Seach histories from wikipedia for a particular day
No auth · HTTPS reported · CORS Unknown
TimeZones iCal Library
Database of official time zones and corresponding iCal VTIMEZONE blocks
No auth · HTTPS reported · CORS Unknown
Non-Working Days
Database of ICS files for non working days
No auth · HTTPS reported · CORS Unknown
How to compare them
Coverage
Compare exact endpoints, fields, geography, history, and update frequency.
Operating cost
Model request volume, caching, overages, support, and migration cost.
Integration risk
Test auth, errors, pagination, latency, versioning, and outage behavior.
Data rights
Review attribution, redistribution, retention, privacy, and commercial-use terms.
Source reference
This page separates source-reported facts from questions that need live provider verification.