Convert dates between 13 calendars and get Islamic, Jewish, Chinese and Persian holiday dates (Ramadan, Eid, Passover, Chinese New Year, Nowruz) for 1900-2100.

Access accurate public holiday data by country and year, including local names, holiday types, dates, regional coverage, and observance details.

Keep track of concerts and gigs easily with our API for all schedules and updates. Never miss your favorite artists again!

Korean public holidays with substitute-holiday logic, plus accurate Revised Romanization of Korean text - in one fast, zero-dependency JSON API on a global edge. Check if any date is a public holiday, list a year's holidays, romanize Hangul, or get today's Korea date and holiday status. Lunar-solar conversion, the 24 solar terms and the sexagenary cycle coming in v1.1.

Accurate, lightweight and fast REST API for Jewish and Hebrew calendar holiday calculation, holiday lookup by key, upcoming holiday lookup, date range filtering, and keyword search across Gregorian

Look up public holidays for 55 countries, calculate business day deadlines, find the next business day, export holidays to iCal, and more — all backed by versioned JSON data with no external dependencies at runtime. Covers 55 countries across Africa, Americas, Asia, Europe and Oceania for years 2024 to 2027.

Access real-time event data for Baltic concerts effortlessly with our Event Data API.

The Upcoming Music Events Tracker API simplifies event tracking for music enthusiasts. By passing a band's name, users effortlessly receive information about the band's upcoming shows. Stay in tune with your favorite artists and never miss a live performance with this user-friendly and efficient API.

Ultimate Chinese Calendar API is a tool that provides information related to the Chinese lunar calendar, also known as the Chinese lunisolar calendar. This calendar is used in several countries, including China, Taiwan, and Vietnam, and is based on the movements of the moon.

Streamline healthcare appointment scheduling by automatically considering Korea's public holidays for optimal patient management.

Get up-to-date information on upcoming MMA fights across major promotions like UFC, Bellator, and ONE Championship.

Calculates business days, SLA due dates, holiday-aware deadlines, skipped weekends and holidays, business hours, and business-time durations.

Streamline your calendar's scheduling process with our Calendar Scheduling Occurrences Calendar Scheduling Occurrences RRULE API.

Expand and manipulate calendar occurrences effortlessly using the Expand Expand Calendar Occurrences RRULE API.

Schedule weekly events with precision using the Weekly BYDAY Recurrence Weekly BYDAY Recurrence RRULE API.

Simplify recurring event management with our Occurrence Recurring Events Occurrence RRULE API for seamless integration.

Ensure your calendar meets RFC 5545 standards with our compliant RFC 5545 Compliant RRULE API for accurate scheduling.

Easily generate and manage iCalendar recurrence rules with this powerful iCalendar Recurrence Rule RRULE API.

Utilize the DTSTART-based approach for effective recurrence management with our DTSTART Based Recurrence RRULE API.

Streamline your applications by retrieving accurate holiday calendar information effortlessly with our Retrieve Holiday Calendar Information API.

Effortlessly access a comprehensive database of global holiday events and dates with our Holiday Events Data Fetch API.

Quickly extract vital holiday schedule data for planning and analytics using our Holiday Schedule API.

Antenatal visit dates from the WHO 2016, NICE or ACOG published schedules, as calendar dates.

Ensure timely project deliveries with the SLA Deadline Calculator, using global holidays for precise deadline calculations.

Calculate business days accurately while accessing global holiday data to optimize your workflows.