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

Libera.Date.Api is a high-precision date calculation engine designed to streamline business logic for global applications. Its core strength lies in its advanced Working Days System, which accurately calculates business days by automatically excluding weekends and public holidays for multiple countries (including 100 countries). Beyond simple duration checks, the API offers intelligent scheduling tools like finding the nearest available working day, analyzing date ranges for non-working intervals, and distinguishing between standard weekends and legal holidays. Whether you are computing SLAs, planning delivery windows, or building HR rosters, Libera.Date.Api ensures your dates align with real-world business calendars.

The Future UK Bank Holidays API allows developers to retrieve future bank holidays in the United Kingdom by using a required parameter for the date.

Structured employment standards data for 40 countries worldwide. Endpoints cover minimum wage (with regional breakdowns and 3-year history), leave, overtime, notice periods, probation, severance, 13th-month obligations, a payroll cost estimator, a deterministic hiring-complexity score, comparison, and a changelog. All data is curated from ILO and government labour ministry sources and updated annually. No database, no runtime scraping — fast and deterministic responses.

Accurate business-day, holiday, and scheduling math for major countries and their subdivisions — without maintaining a single holiday calendar yourself. Add or subtract working days, check if a date is a business day, find the next valid date, or count working days between two dates, with full support for regional subdivisions, custom weekends, and your own blackout dates. One simple GET call, instant JSON.

Enhance your scheduling with the Smart API, designed to simplify date and business day calculations with intelligence.

Trust our Reliable API for consistent date and business day calculations, ensuring you never miss a deadline again.

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.

The Global Vacation Data API offers detailed insights into paid vacation days and public holidays across multiple countries, enabling comparisons and analysis.

The Vacation Stats API provides detailed statistics on paid vacation days and public holidays across various countries, facilitating comparisons and analysis.

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

Uncover severance pay guidelines worldwide to protect your business and employees.

Explore notice period requirements across 40 countries for seamless workforce transitions.

Calculate payroll costs in different markets to streamline budgeting and human resources.

Assess the hiring complexity score by country to make informed recruitment decisions.

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

Applies ACOG Committee Opinion 700 Table 1 to decide whether an ultrasound overrides LMP dating.

Due date from embryo transfer date. Day-3, day-5, day-6 and egg retrieval calculated separately.

Ovulation estimate and 6-day fertile window from cycle length. Not contraceptive guidance.

Due date from last menstrual period using Naegele's rule, with 21-45 day cycle length correction.

Dating from BPD, HC, AC and FL measurements in millimetres, using Hadlock 1984 equations.

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

Learn about 13th month pay regulations to ensure compliance and attract talent globally.

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.