Calendar · head-to-head
Nager.Date vs The Calendar
Nager.Date is a free, open-source public holiday API covering 204 countries, with endpoints for a year's full holiday list, the next public holiday, whether today is a holiday, and country metadata — all keyless JSON with no rate limiting. It's maintained on GitHub by a single developer and is popular as the default holiday backend baked into several scheduling and HR libraries specifically because it needs no signup. The old v3 endpoints are deprecated; the provider will retire them on 31 January 2027, so new integrations should use v4.
The Calendar publishes pre-generated, static JSON (and downloadable .ics) files for US federal and all-50-state holidays (2025–2028), 30 countries' public holidays, plus FOMC meeting dates, US tax deadlines, market holidays, and key-date calendars for a dozen sports leagues. Every one of its 99 documented endpoints is a flat file behind Cloudflare, so there's no authentication, no rate limit, and CORS is wide open — licensed CC BY 4.0 as long as you link back.
| Nager.Date | The Calendar | |
|---|---|---|
| Authentication | None | None |
| Pricing | free | free |
| Formats | JSON | JSON, ICS |
| CORS | yes | yes |
| HTTPS | Yes | Yes |
The Calendar supports 2 response formats, while Nager.Date offers fewer — pick The Calendar for more integration flexibility.