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

Effortlessly convert multiple users’ working hours across time zones into synchronized UTC availability while retrieving precise local times for each participant.

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.

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.

Unlock a world of celebration with the Holidays API! Dive into a treasure trove of festive data spanning 230+ countries. Delve into past revelries or plan ahead with future calendars. From public jubilations to religious observances and bank holidays, this API ensures your application is always in sync with global festivities.

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.

Easily identify overlapping time zones to streamline scheduling across different regions with our API.

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

Unlock the tapestry of time with the Events in History API—a portal to explore the profound and pivotal moments that shaped our world. From ancient marvels to contemporary milestones, this API unveils a kaleidoscope of renowned events, offering a captivating journey through the annals of human history.

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

Conception date from a last menstrual period or from a known due date, as ISO 8601 dates

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.

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.

Easily retrieve rich information about crucial historical events using the Retrieve Historical Events Information API.

Retrieve and explore an extensive archive of historical events with the Historical Events Archive Retrieval API.

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

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

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

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

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

Expands an iCalendar RRULE into occurrence dates between a start and end time.

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

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