Widget API to calculate Geo Coordinates, Geo Fences and Sky, Sun, Moon, Eclipse information.

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.

Horoscope by Date API delivers daily personalized zodiac predictions based on specific dates, offering insights into emotions, energy, and life guidance.

Korean public holidays with substitute-holiday logic, plus accurate Revised Romanization of Korean text - in one fast, zero-dependency JSON API on a global edge. Check if any date is a public holiday, list a year's holidays, romanize Hangul, or get today's Korea date and holiday status. Lunar-solar conversion, the 24 solar terms and the sexagenary cycle coming in v1.1.

Explore the phases of the moon with Horoscope Information API for enhanced planning.

The Chinese Zodiac API provides information about the Chinese zodiac in both simplified and traditional languages.

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.

Unlock the cosmos with our Astrological API! Delve into destiny with daily, weekly, and monthly horoscopes tailored to your zodiac journey. Illuminate your path with insights for all 12 sun signs, offering celestial guidance at your fingertips.

Access daily horoscope forecasts in chinese instantly through our user-friendly Chinese Horoscope API.

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.

Ultimate Chinese Calendar API is a tool that provides information related to the Chinese lunar calendar, also known as the Chinese lunisolar calendar. This calendar is used in several countries, including China, Taiwan, and Vietnam, and is based on the movements of the moon.

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.

Ensure your calendar meets RFC 5545 standards with our compliant RFC 5545 Compliant RRULE API for accurate scheduling.

Streamline your calendar's scheduling process with our Calendar Scheduling Occurrences Calendar Scheduling Occurrences RRULE API.

The Moon Phase Tracker API supports Hungarian cities, provides lunar data such as phase, distance, illumination, altitude, next full/new moon and moonrise and moonset times.

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.

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.

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

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