Date conversion thingy

Time

Hour	Minute	Second	Time Zone (±hhmm)

Gregorian calendar (currently used in much of the world, including the US)

Era	Year	Month	Day

Julian calendar (historic)

Era	Year	Month	Day

Variations on Gregorian calendar

	Year	Month	Day
Zero-indexed
Days of Christmas		th day of Christmas
Kalends/Nones/Ides

Computer dates

Seconds since 1970 (Unix time):

Milliseconds since 1970:

ISO:

Other

Julian day number: