Module dates 

Immutable Gregorian dates, stored as days since 1970-01-01. Public domain: 0001-01-01 through 9999-12-31. No clock is read here.

Constants

MAX

MIN

WEEKDAYS

Functions

add_days

add_months

add_workdays

Weekdays only, in constant time even for huge offsets. The starting date is not counted. A zero offset leaves even a weekend unchanged.

add_workdays_with_holidays

Holidays must be sorted, unique and weekdays. Each crossed holiday is visited once, extending the target by one weekday in the chosen direction.

add_years

end_of_month

format

from_civil

Days since 1970-01-01 for a year, month (1–12) and day (1–31).

from_parts

from_unix_seconds

parse

Exactly ten ASCII bytes. Validate before doing any calendar arithmetic.

start_of_month

to_civil

Year, month and day of a day number.

valid

weekday

0 = Monday … 6 = Sunday.