Simple implementation of the Gregorian calendar for Rust.
Gregorian rules are used for all time, which is not historically accurate before 1583.
UnixTimestamp represents 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.)DateTime represents a date in the Gegorian calendar and in a given time zone,
with components year, month, day, hour, minute, and second.#![no_std]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.