A simple date library. Inspired by code from LexiFi. This library does not handle any ancient calendars or anything like that. It's designed for simplicity (and thereby speed).

futhark pkg add github.com/diku-dk/date
futhark pkg sync

> import "lib/github.com/diku-dk/date/date"
> check_date (1900, 2, 29)
false
> check_date (2000, 2, 29)
true