Russian Calendar
Check if a date is a Russian holiday or not
- Authentication
- No auth
- HTTPS
- Yes
- CORS
- No
- Category
- Calendar
- Documentation / URL
- https://github.com/egno/work-calendar
Overview
Russian Calendar (isdayoff) provides Russian holiday checks — keyless (returns a digit string; the HTTP status was 404 on our check but the body carried data, verified).
Quick Start
Month (data string returned):
curl "https://isdayoff.ru/api/getdata?year=2026&month=8&cc=RU"101Authentication
None — keyless.
Rate Limits & Notes
- Free; be polite — no hard published limit.
- Holiday checks.
FAQ
Is Russian Calendar free? Yes — free and keyless.
Why 404 with data? Our 2026-08 check got a data body despite the status (verified) — check the docs.
What does it return? Holiday flags.
More in Calendar
| API | Auth | HTTPS | CORS | |
|---|---|---|---|---|
| caldays Public holidays for 195+ countries | No auth | Yes | Yes | ↗ |
| Calendarific Worldwide Holidays | API Key | Yes | Unknown | ↗ |
| Checkiday - National Holiday Industry-leading holiday data with over 5,000 holidays and thousands of descriptions | API Key | Yes | Unknown | ↗ |
| Church Calendar Catholic liturgical calendar | No auth | No | Unknown | ↗ |
| Czech Namedays Calendar Lookup for a name and returns nameday date | No auth | No | Unknown | ↗ |