Date conversion and calendar facts for agents: Julian Day, Julian, Hebrew, Islamic tabular and Persian calendars, Chinese zodiac, moon phases and seasons.
payments ON MAINNET (real money) · 12 live endpoints
| Endpoint | Price | What it answers |
|---|---|---|
GET /age-profile | $0.02 | Age in years, months, days and days lived, Korean and East Asian ages, next birthday with leap-day rules, and zodiac. |
GET /chinese-zodiac | $0.02 | Chinese zodiac animal, element, yin/yang and Chinese New Year date for a year or a date (New Year table 1901-2100). |
GET /day-of-week | $0.02 | Weekday of any date from year 1 to 9999 (Gregorian or Julian calendar) with day of year, quarter, ISO week and ISO week-date. |
GET /hebrew-calendar | $0.02 | Convert a Gregorian date to the Hebrew calendar (or back) with leap year, year type and major holiday dates. |
GET /islamic-calendar | $0.02 | Convert a Gregorian date to the Islamic tabular civil calendar (or back); a calculated approximation, not moon sighting. |
GET /julian-calendar | $0.02 | Convert between Gregorian and Julian calendar dates (Old Style / New Style) with the day difference for that date. |
GET /julian-day | $0.02 | Julian Day, modified JD and Julian Day Number for a date and UTC time (Gregorian or Julian calendar), or JD back to a date. |
GET /leap-year | $0.02 | Is a year a leap year in the Gregorian, Julian, Hebrew, Islamic (tabular) or Persian calendar? Rule and nearby leap years. |
GET /moon-calendar | $0.02 | All new moons, first quarters, full moons and last quarters in a month (UTC) with times and a blue-moon flag. |
GET /moon-phase | $0.02 | Moon phase name, age in days, approximate illumination and the previous/next new, quarter and full moon times for a date. |
GET /persian-calendar | $0.02 | Convert a Gregorian date to the Persian Solar Hijri calendar (or back) using the astronomical Nowruz rule, 1901-2100. |
GET /seasons | $0.02 | March and September equinox and June and December solstice moments (UTC) for a year, with season lengths in days. |
GET /catalog returns this list as JSON. Activity hub · uptime.
Results are computed locally from published calendar and astronomy algorithms, provided as is, with no warranty. Islamic dates are the tabular approximation and may differ from observed month starts by a day or two; religious observance dates must be confirmed with the relevant authority. Astronomical times carry the stated accuracy only. Every paid response carries a disclaimer field.