Nager.DateNager.Date public-holiday API

GET/api/v4/IotHolidays/{isoCode}/IsToday/{offset}

Check whether today is a public holiday

Checks whether today is a public holiday for a country or ISO 3166-2 subdivision at UTC or the requested offset; 200 means yes and 204 means no.

Look up supported countries, country information, annual or upcoming public holidays, today's holiday status, and the service version. The complete Community API v4 has six read-only endpoints; commercial use requires active sponsorship.