Simple implementation of the Gregorian calendar for Rust.
Gregorian rules are used for all time, which is not historically accurate before 1583.
UnixTimestamprepresents an instant as a (possibly negative) integer number of seconds since the Unix Epoch, January 1st 1970 at midnight UTC. (There is no sub-second resolution.)NaiveDateTimerepresents a date in the Gregorian calendar with components year, month, day, hour, minute, and second. By itself, it can not be interpreted as an instant in time.DateTimeis aNaiveDateTimetogether with a time zone.
By default the crate uses #![no_std] so that it can be used in freestanding environments.
If the system_time Cargo feature is enabled,
it uses std to implement conversions to and from std::time::SystemTime.