Russian Calendar
HTTPS No CORS Free
Check if a date is a Russian holiday or not
API Endpoint
https://github.com/egno/work-calendarMore Calendar APIs
Worldwide Holidays
HTTPS CORS ? apiKey
Industry-leading Holiday API. Over 5,000 holidays and thousands of descriptions. Trusted by the World’s leading companies
HTTPS CORS ? apiKey
Catholic liturgical calendar
HTTP CORS ? Free