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 Time Zone Data API provides accurate time zone information based on geographic coordinates, including offsets, time zone IDs and daylight saving time details.

The Distance and Duration API calculates the travel distance and duration between origin and destination points, providing detailed route and time information quickly and efficiently.

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.

Convert any date and time between world time zones with correct daylight saving handling, get the current time of any zone with its offset, or list every supported zone name. Daylight saving rules follow the standard worldwide zone database.

Count working days between two dates or add business days to a date, skipping weekends and public holidays of 100+ countries and regions.

Accurate timezone data including UTC and DST offsets for any location on the globe.

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

The Sunrise and Sunset Times API provides accurate sunrise and sunset timings based on specified dates, latitude, and longitude coordinates.

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

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

Get precise results every time with our Accurate API for calculating dates and business days—perfect for business professionals.

Sunrise, sunset, twilight, golden hour and day length plus moon phase, illumination and moonrise for any coordinates and date, returned in local time.

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.

Instantly discover how old a domain is, including years, months, days, registration date, and expiration, in a structured, easy-to-use format.

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

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

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

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

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

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

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

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

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