Calendar Systems x402 REST usage
March and September equinox and June and December solstice moments (UTC) for a year, with season lengths in days.
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March and September equinox and June and December solstice moments (UTC) for a year, with season lengths in days.
Get the ISO 8601 week number, ISO day-of-week, quarter, and day-of-year for any date. Useful for fiscal/reporting calendars, weekly aggregations, and sprint planning.
Return the ISO weekday (1=Monday..7=Sunday) and its name for a Gregorian date.