iranholidays is a small python library that provides functions to check if a date is a holiday in Iran or not.

Warning: For Islamic holidays, like Eid al-Fitr, the calculation may be off by a day or two since those events depend on seeing the moon by naked eye and cannot be predicted by computers.

from iranholidays import holiday_occasion

assert holiday_occasion((2024, 4, 1, 'G')) == 'Sizdah Be-dar'  # Gregorian
assert holiday_occasion((1403, 1, 13, 'S')) == 'Sizdah Be-dar'  # Solar
assert holiday_occasion((1403, 1, 14, 'S')) is None
assert holiday_occasion((1445, 9, 21, 'L')) == 'Martyrdom of Ali'  # Lunar

In case you have a date object from the following libraries, you can check it directly using one of the off_occasion_* functions:

import datetime

import hijri_converter
import jdatetime

from iranholidays import (
    off_occasion_gregorian,
    off_occasion_lunar,
    off_occasion_solar,
)

date = datetime.date(2024, 4, 1)
assert off_occasion_gregorian(date, weekend=()) == 'Sizdah Be-dar'

date = jdatetime.date(1403, 1, 13)
assert off_occasion_solar(date, weekend=()) == 'Sizdah Be-dar'

date = hijri_converter.Hijri(1445, 9, 21)
assert off_occasion_lunar(date, weekend=()) == 'Martyrdom of Ali'

off_occasion function checks if a date is a weekend or holiday and returns the occasion string or None. The default value for weekend parameter is (4,) which means Friday. Either pass a different value to weekend parameter to override it or use set_default_weekend function to change this default for all functions:

from iranholidays import off_occasion, set_default_weekend
date = (2024, 2, 5, 'G')  # a non-holiday Monday
assert off_occasion(date) is None
assert off_occasion(date, weekend=(0,)) == 'Weekend'
set_default_weekend((0,))  # set default weekends to Thursday and Friday
assert off_occasion(date) == 'Weekend'