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.

Convert numbers to perfectly formatted text across 28 languages and over 35 predefined currencies. Our API handles standard, formal, and check writing formats with support for custom currencies. Perfect for financial documents, legal contracts, invoices, and multilingual applications. Simple integration with comprehensive documentation.

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 color between the common web and print formats in one call. Flexible input, including six or three digit hex and common color names; the answer returns every format at once plus ready-to-paste style strings.

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.

This API converts local phone numbers to international format, returning the number and destination in a standardized format for global compatibility.

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.

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.

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.

Validate transaction dates against Korea's public holidays, ensuring compliance and smooth fintech operations.

Horoscope Date API is a powerful tools that provide developers with access to a vast database of astrological information, including horoscopes, zodiac signs, and other related data.

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

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

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

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

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

Date and time edge cases: Feb 29, DST gaps, year 2038, leap seconds, and quarter-hour UTC offsets. Reproducible seeds, and every value explains what it breaks.

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

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

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