API archive entry · source-reported
Nager.Date
Public holidays for more than 200 countries
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.
OpenHolidays API
Public and school holidays for many countries via an open REST API
No auth · HTTPS reported · CORS Yes
caldays
Public holidays for 195+ countries
No auth · HTTPS reported · CORS Yes
Namedays Calendar
Provides namedays for multiple countries
No auth · HTTPS reported · CORS Yes
Non-Working Days
Simple REST API for checking working, non-working or short days for Russia, CIS, USA and other
No auth · HTTPS reported · CORS Yes
The Calendar
Public holidays for US states and 30 countries plus sports and finance calendars as static JSON
No auth · HTTPS reported · CORS Yes
Byabbe
Seach histories from wikipedia for a particular day
No auth · HTTPS reported · CORS Unknown
How to compare them
Coverage
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Operating cost
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Integration risk
Test auth, errors, pagination, latency, versioning, and outage behavior.
Data rights
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Source reference
This page separates source-reported facts from questions that need live provider verification.