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Calendar APIs

Browse calendar API resources and compare source-reported access requirements. Open the provider’s documentation to confirm current terms and capabilities.

22APIs

1Categories

15No Authentication

18HTTPS Supported

Browse all 52 categories

APILayer APIs17 Animals24 Anime20 Anti-Malware17 Art & Design31 Authentication & Authorization7 Blockchain18 Books26 Business47 Calendar22 Cloud Storage & File Sharing19 Continuous Integration6 Cryptocurrency96 Currency Exchange27 Data Validation16 Development220 Dictionaries15 Documents & Productivity53 Email38 Entertainment19 Environment30 Events5 Finance97 Food & Drink36 Games & Comics111 Geocoding112 Government126 Health47 Jobs37 Machine Learning54 Music36 News26 Open Data79 Open Source Projects11 Patent4 Personality27 Phone8 Photography38 Programming5 Science & Math59 Security61 Shopping28 Social58 Sports & Fitness66 Test Data37 Text Analysis20 Tracking11 Transportation97 URL Shorteners21 Vehicle16 Video58 Weather47

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CategoryAuthenticationHTTPSCORSSort

22 matching APIs · Loading full catalog…

Source listed

Africa Compliance Data

Calendar

Public holidays and business days for all 54 African countries, from official sources

Auth: API Key
HTTPS: Yes
CORS: Yes

View Documentation Details →

Source listed

caldays

Calendar

Public holidays for 195+ countries

Auth: No Auth
HTTPS: Yes
CORS: Yes

Visit Provider Details →

Source listed

Calendarific

Calendar

Worldwide Holidays

Auth: API Key
HTTPS: Yes
CORS: Unknown

Visit Provider Details →

Source listed

Checkiday - National Holiday

Calendar

Industry-leading holiday data with over 5,000 holidays and thousands of descriptions

Auth: API Key
HTTPS: Yes
CORS: Unknown

Visit Provider Details →

Source listed

Church Calendar

Calendar

Catholic liturgical calendar

Auth: No Auth
HTTPS: No
CORS: Unknown

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Source listed

CountdownsHQ

Calendar

Dates and timezone-correct countdowns for 150+ holidays and observances in 18 countries

Auth: No Auth
HTTPS: Yes
CORS: Yes

View Documentation Details →

Source listed

Czech Namedays Calendar

Calendar

Lookup for a name and returns nameday date

Auth: No Auth
HTTPS: No
CORS: Unknown

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Source listed

Festivo Public Holidays

Calendar

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

Auth: API Key
HTTPS: Yes
CORS: Yes

View Documentation Details →

Source listed

Google Calendar

Calendar

Display, create and modify Google calendar events

Auth: OAuth
HTTPS: Yes
CORS: Unknown

View Documentation Details →

Source listed

Hebrew Calendar

Calendar

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

Auth: No Auth
HTTPS: No
CORS: Unknown

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Source listed

Holidays

Calendar

Historical data regarding holidays

Auth: API Key
HTTPS: Yes
CORS: Unknown

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Source listed

India Public Holidays

Calendar

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

Auth: No Auth
HTTPS: Yes
CORS: Yes

View Documentation Details →

Source listed

Intellibook

Calendar

Appointment booking and availability API for salons and clinics

Auth: No Auth
HTTPS: Yes
CORS: Yes

View Documentation Details →

Source listed

LectServe

Calendar

Protestant liturgical calendar

Auth: No Auth
HTTPS: No
CORS: Unknown

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Source listed

Nager.Date

Calendar

Public holidays for more than 90 countries

Auth: No Auth
HTTPS: Yes
CORS: No

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Source listed

Namedays Calendar

Calendar

Provides namedays for multiple countries

Auth: No Auth
HTTPS: Yes
CORS: Yes

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Source listed

Non-Working Days

Calendar

Database of ICS files for non working days

Auth: No Auth
HTTPS: Yes
CORS: Unknown

View Documentation Details →

Source listed

Non-Working Days

Calendar

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

Auth: No Auth
HTTPS: Yes
CORS: Yes

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Source listed

Public Holidays

Calendar

Data on national, regional, and religious holidays via API

Auth: API Key
HTTPS: Yes
CORS: Yes

Visit Provider Details →

Source listed

Russian Calendar

Calendar

Check if a date is a Russian holiday or not

Auth: No Auth
HTTPS: Yes
CORS: No

View Documentation Details →

Source listed

The Calendar

Calendar

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

Auth: No Auth
HTTPS: Yes
CORS: Yes

View Documentation Details →

Source listed

UK Bank Holidays

Calendar

Bank holidays in England and Wales, Scotland and Northern Ireland

Auth: No Auth
HTTPS: Yes
CORS: Unknown

Visit Provider Details →

Choose an API with clear expectations

Use No Auth to find entries reported as not requiring credentials. It does not mean unlimited use. HTTPS describes source-reported transport support; it is different from the protocol of the documentation link. CORS concerns browser requests, so a service can work on a backend even when browser access is unavailable.

First confirm that the provider still documents your use case. Read its pricing, quotas, data license and privacy terms, then test with non-sensitive sample data in your own environment. Favorites are saved in this browser so you can compare candidates later.

Source synchronized 2026-10-26 · Revision 82e763ed · Report a source problem