Calendar — entry 001 of 17
caldays
Caldays provides free public holiday data for 206 countries in JSON format, plus long-weekend calculations and a world clock endpoint. Anonymous use is capped at 10,000 requests per day; a metered API key raises the limit for higher-volume needs. The holiday data carries a CC BY 4.0 licence, so users must credit Caldays in their app.
AuthenticationNone requiredCall it straight away — no key, no signup.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreemiumA usable free tier exists, with paid plans for more volume.
FormatsJSONResponses can be requested as JSON.
GreatAPIs Score
Score71
Authentication25/25No authentication required
Pricing17/20Freemium tier available
Docs0/20No docs or spec available
Formats9/15Single response format
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/caldays/"><img src="https://greatapis.com/badge/caldays.svg" alt="Scored 71 on greatapis.com"></a>Auth quickstart
- No key needed — call it now.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.
Try it
Developer reference
Base URL
https://caldays.com/apiRate limit
10,000 requests per day per IP with no key; a metered API key raises the daily cap. Requests over the limit return HTTP 429.
Key endpoints
- GET/holidays/{cc}
- GET/long-weekends/{cc}
- GET/clock
Changelog
- gained rate limits and a pricing page