API archive entry · source-reported
Calendarific
Worldwide Holidays
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.
Checkiday - National Holiday
Industry-leading holiday data with over 5,000 holidays and thousands of descriptions
API key · HTTPS reported · CORS Unknown
Holidays
Historical data regarding holidays
API key · HTTPS reported · CORS Unknown
Festivo Public Holidays
Fastest and most advanced public holiday and observance service on the market
API key · HTTPS reported · CORS Yes
Public Holidays
Data on national, regional, and religious holidays via API
API key · HTTPS reported · CORS Yes
Google Calendar
Display, create and modify Google calendar events
OAuth · 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
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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.