Current time or any date in any IANA time zone with UTC offset, weekday and Unix time. Convert one moment to many time zones at once.

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

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

The Time Zone Tracker API offers reliable time zone information based on geographic coordinates, including offsets, time zone identifiers, and information regarding daylight saving time.

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

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.

A globally usable mortgage and loan calculator supporting multiple currencies. Covers monthly repayments, full amortisation schedules, affordability reverse-calculation, early repayment savings, side-by-side comparison, total cost of ownership, APR, debt-to-income ratio, stamp duty estimates, refinance break-even, balloon payments, interest-only periods, loan consolidation, and biweekly payment options. Pure maths — no external data sources. Pass any currency code (USD, GBP, EUR, ZAR, AUD, etc.) for localised display.

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

Calculate time zone overlap quickly to optimize meetings and enhance productivity across different locations.

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

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.

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.

Embark on a temporal journey with the World Time API – your global clock for instant access to the current date and time in any city. Seamlessly integrating with applications, this API synchronizes the world, ensuring users stay connected to the heartbeat of time across diverse corners of the globe.

The World Clock API provides accurate and real-time time zone data, world clock functionalities, and calendar integration for global users.

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

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

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.

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

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