JulianDate :: # (opaque)Proleptic Julian day, with astronomical years (0 means 1 BCE). Valid years are -2147483648 through 2147483647, inclusive. No timezone or resolved timeline is implied by a date.
from_fields : Fields -> Try(JulianDate, [OutOfRange, InvalidMonth, InvalidDay, ..])Validate a proleptic Julian date with astronomical year numbering. Return OutOfRange outside the supported year range, InvalidMonth outside 1..12, or InvalidDay for a nonexistent day. No clamping is performed.
days_in_month : I64, U8 -> Try(U8, [OutOfRange, InvalidMonth, ..])Return the number of days in a Julian month, including its leap-year rule. Reject unsupported years with OutOfRange and months outside 1..12 with InvalidMonth.
to_fields : JulianDate -> FieldsRead the validated astronomical year and one-based month/day in the Julian calendar.
to_civil_day : JulianDate -> CivilDayConvert this date to the shared civil-day coordinate. Equal dates across calendars have equal coordinates; no timezone is chosen.
from_civil_day : CivilDay -> Try(JulianDate, [OutOfRange, ..])Describe a shared civil-day coordinate in the Julian calendar. Return OutOfRange if that day lies outside the supported year range.
Hash Julian dates consistently with equality for dictionary and set keys. Hash values are not a stable serialization format.
to_inspect : JulianDate -> StrReturn a concise diagnostic description of these Julian dates. Use explicit conversions or text serialization when storing or exchanging data.
Whether the first of two Julian dates precedes the second in their numeric order.
Whether the first of two Julian dates precedes or equals the second.
Whether the first of two Julian dates follows the second in their numeric order.
Whether the first of two Julian dates follows or equals the second.
Equality of Julian dates; values of other temporal domains must be converted explicitly.
Astronomical year and one-based month/day fields for a Julian date. Year zero means 1 BCE; from_fields validates combinations and provider range.