Crate gregorian

An implementation of the proleptic Gregorian calendar. In this implementation, before the year 1 come year 0. The library does not deal with times.

The Date type represents a date (year, month and day), the Year type represents a calendar year, the Month type represents a calendar month, and the YearMonth type represents a month of a specific year.

Example

use gregorian::{Date, Month::*, Year, YearMonth};

assert!(Year::new(2020).has_leap_day(), true);
assert!(YearMonth::new(1900, February).total_days() == 28);
assert!(YearMonth::new(2000, February).total_days() == 29);

assert!(Year::new(2020).with_month(March).first_day() == Date::new(2020, March, 1).unwrap());
assert!(Year::new(2020).with_month(March).last_day() == Date::new(2020, March, 31).unwrap());

assert!(Year::new(2020).first_day() == Date::new(2020, 1, 1).unwrap());
assert!(Year::new(2020).last_day() == Date::new(2020, 12, 31).unwrap());

assert!(Date::new(2020, 2, 1).unwrap().day_of_year() == 32);

Re-exports

pub use Month::*;

Structs

Date	A calendar date consting of a year, month and day.
InvalidDateSyntax	The string does not follow the proper date syntax.
InvalidDayOfMonth	The day is not valid for the year and month.
InvalidDayOfYear	The day-of-year is not valid for the year.
InvalidMonthNumber	The month number is not valid.
Year	A calendar year.
YearMonth	A month of a specific year.

Enums

DateParseError	The string is not a valid date.
InvalidDate	The date is not valid.
Month	A month on the Gregorian calendar.

Constants

MONTHS

All months in order as array.