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.

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.

The Location Boundaries API is a tool that uses HTTP POST requests to retrieve location boundaries. It enables users to obtain information on the boundaries of a specific location, including those it is a part of and those it encompasses. This API is useful for a variety of applications, including location-based services, geographic analysis, and demographic research.

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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 API delivers seamless date and business day calculations worldwide, catering to international business needs.

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

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

Trimester boundaries, 24w0d viability, and four preterm and four term classes with their dates.

Gestational age at any given date, returned as a 29w2d label and as total days.

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

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.

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

Pregnancy due date and gestational age API. EDD from LMP, conception, IVF transfer day, or ultrasound CRL. ACOG redating rules, trimester, and term milestones. Deterministic ISO 8601 dates.

Capture essential time zone overlap data effortlessly to enhance global collaboration and scheduling accuracy.

Quickly retrieve comprehensive time zone overlap data for precise planning and effective communication.

Extract vital time zone overlap information seamlessly to improve cross-region coordination and connection.

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

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

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

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