What are the best Calendar APIs? (2026)

Data on national, regional, and religious holidays via API

Worldwide Holidays

Industry-leading Holiday API. Over 5,000 holidays and thousands of descriptions. Trusted by the World’s leading companies

Catholic liturgical calendar

This API provides real time traffic obstruction events occuring within the City of Surrey.

Lookup for a name and returns nameday date

The Ticketmaster Discovery API allows you to search for events, attractions, or venues.

The Dispatch API enables the developer to specify a multiple message workflow. A workflow follows a template. The first one we are adding is the failover template. The failover template instructs t...

These are the OpenAPI specs that describe the REST API of Easy!Appointments.

Fastest and most advanced public holiday and observance service on the market

Generates iCal calendar events that can be used across calendar applications

Display, create and modify Google calendar events

Convert between Gregorian and Hebrew, fetch Shabbat and Holiday times, etc

Historical data regarding holidays

The following issued documents can be integrated with DigiLocker and get used by candidates for service delivery - 1.One Time Verification -OTV certificate � issued to candidates qualified for appo...

Protestant liturgical calendar

Public holidays for more than 90 countries

Provides namedays for multiple countries

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

Database of ICS files for non working days

Public and school holidays for many countries via an open REST API

Check if a date is a Russian holiday or not

# Overview Information and statistics about FIRST Robotics Competition teams and events. # Authentication All endpoints require an Auth Key to be passed in the header `X-TBA-Auth-Key`. If yo...

Bank holidays in England and Wales, Scotland and Northern Ireland