CountdownsHQ API alternatives

Dates and timezone-correct countdowns for 150+ holidays and observances in 18 countries. If it doesn't fit your project, here are the 10 best free Calendar APIs to use instead in 2026, out of 21 in the directory.

For reference, CountdownsHQ API: No API key needed · Callable from the browser (CORS) · HTTPS.

1. 1

   caldays API

   Online · 867 ms

   Public holidays for 195+ countries.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
2. 2

   The Calendar API

   Online · 643 ms

   Public holidays for US states and 30 countries plus sports and finance calendars as static JSON.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
3. 3

   India Public Holidays API

   Online · 459 ms

   Official Indian public holidays for the Central government and 36 states/UTs.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
4. 4

   UK Bank Holidays API

   Online · 62 ms

   Bank holidays in England and Wales, Scotland and Northern Ireland.

   • No API key needed
   • Fast: 62 ms response
   • Returns JSON at its URL
   • HTTPS

   No authHTTPSCORS ?
5. 5

   Intellibook API

   Online · 1280 ms

   Appointment booking and availability API for salons and clinics.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
6. 6N

   Namedays Calendar API

   Online · 616 ms

   Provides namedays for multiple countries.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
7. 7

   Non-Working Days API

   Online · 2770 ms

   Simple REST API for checking working, non-working or short days for Russia, CIS, USA and other.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
8. 8

   Non-Working Days API

   Online · 565 ms

   Database of ICS files for non working days.

   • No API key needed
   • HTTPS

   No authHTTPSCORS ?
9. 9

   Nager.Date API

   Online · 1111 ms

   Public holidays for more than 90 countries.

   • No API key needed
   • HTTPS

   No authHTTPSNo CORS
10. 10

    Russian Calendar API

    Online · 661 ms

    Check if a date is a Russian holiday or not.

    • No API key needed
    • HTTPS

    No authHTTPSNo CORS

CountdownsHQ API vs alternatives

CountdownsHQ API compared with its alternatives

API	API key	HTTPS	CORS	Uptime	Response	Rating
CountdownsHQ	No	Yes	Yes	Up	623 ms	Not rated
caldays	No	Yes	Yes	Up	867 ms	Not rated
The Calendar	No	Yes	Yes	Up	643 ms	Not rated
India Public Holidays	No	Yes	Yes	Up	459 ms	Not rated
UK Bank Holidays	No	Yes	Unknown	Up	62 ms	Not rated
Intellibook	No	Yes	Yes	Up	1280 ms	Not rated
NNamedays Calendar	No	Yes	Yes	Up	616 ms	Not rated
Non-Working Days	No	Yes	Yes	Up	2770 ms	Not rated
Non-Working Days	No	Yes	Unknown	Up	565 ms	Not rated

See also: best Calendar APIs · all Calendar APIs