Calendar

Abstract Public Holidays

Data on national, regional, and religious holidays via API

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API Almanac

SELLS HERE

Reference data your agents won't hallucinate: time zones, public holidays and business days, sunrise and moon phases, unit conversion, country, currency and language facts, airports, US ZIP codes, NAICS codes, daily ECB exchange rates, and validators for IBAN, email, phone and card numbers. One key, every endpoint, JSON only, with an MCP server for agents. Operated by APIDirectory.

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openapi 3.1

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Business Day Calculator

Counts business days in a date range for England and Wales

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openapi 3.0

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caldays

Public holidays for 195+ countries

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Calendarific

Worldwide Holidays

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Checkiday - National Holiday

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

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Checkiday - National Holiday API

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

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Church Calendar

Catholic liturgical calendar

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Czech Namedays Calendar

Lookup for a name and returns nameday date

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Festivo Public Holidays

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

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Google Calendar

Display, create and modify Google calendar events

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Hebrew Calendar

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

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Holidays

Historical data regarding holidays

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Japanese Public Holidays

Japan public holiday dates with English and Japanese names as JSON, CSV or iCalendar, no sign-up, CORS enabled

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Jiejiari API

Public holiday dates and names for China, flagging which days are off days

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LectServe

Protestant liturgical calendar

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Nager.Date

Public holidays for more than 90 countries

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Nager.Date Public Holiday API

Public holidays and long weekends for over 100 countries

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Namedays Calendar

Provides namedays for multiple countries

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Non-Working Days

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

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Non-Working Days

Database of ICS files for non working days

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Russian Calendar

Check if a date is a Russian holiday or not

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The Calendar

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

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Trello

Boards, lists and cards to help you organize and prioritize your projects

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UK Bank Holidays

Bank holidays in England and Wales, Scotland and Northern Ireland

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