Reference data your agents won't hallucinate.

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GET /v1/time/now The current time in a time zone, with offset, DST flag and ISO week GET /v1/time/convert Convert a time from one zone to another GET /v1/time/zones Every IANA time zone with its current UTC offset and abbreviation GET /v1/date/diff Days, weeks, months and business days between two dates GET /v1/date/add Add calendar or business days to a date GET /v1/date/parse Turn natural language like "next Tuesday at 3pm" or "in 3 weeks" into ISO dates GET /v1/holidays Public holidays for a country and year, optionally for one state or region GET /v1/holidays/countries Countries with holiday data, and their subdivisions GET /v1/sun Sunrise, sunset, solar noon, twilights and day length for a place and date GET /v1/moon Moon phase, illumination and the next new and full moons GET /v1/units Every unit the converter knows, grouped by category GET /v1/units/convert Convert a value between two units of the same kind