Research data
CF idealized calendar times
Decode numeric offsets and round-trip dates in explicit model calendars.
Your inputs
Start with an exampleYour result
Example resultHow it works
Use fixed model-year and month lengths with exact integer microseconds. Normalize numeric reference offsets, add fixed SI time units and invert the selected calendar. Reverse output includes exact fractions when a decimal would repeat.
In 360_day, offsets 0,1,2,3 from February 28 yield February 28, 29, 30 and March 1. These are model dates.
Limits
Supports second/minute/hour/day units, model years 0000…9999, numeric ±HH:MM offsets and 5000 rows. Decimal/scientific or exact-fraction offsets must resolve to whole microseconds. No civil/UTC conversion, DST, leap seconds, year/month units or netCDF parsing. Fractions are an export representation, not a netCDF storage type.