Add Iran holidays

README.rst

@@ -109,7 +109,7 @@ Available Countries
 .. _ISO 639-1 code: https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
 .. _ISO 639-2 code: https://en.wikipedia.org/wiki/List_of_ISO_639-2_codes
 
-We currently support 133 country codes. The standard way to refer to a country
+We currently support 134 country codes. The standard way to refer to a country
 is by using its `ISO 3166-1 alpha-2 code`_, the same used for domain names, and
 for a subdivision its `ISO 3166-2 code`_. Some of the countries support more
 than one language for holiday names output.
@@ -377,6 +377,10 @@ The list of supported countries, their subdivisions and supported languages
      - ID
      -
      - en_US, **id**, uk
+   * - Iran
+     - IR
+     -
+     - en_US, **fa**
    * - Ireland
      - IE
      -

holidays/calendars/__init__.py

@@ -20,4 +20,5 @@
 from holidays.calendars.islamic import _CustomIslamicCalendar, _IslamicLunar
 from holidays.calendars.julian import JULIAN_CALENDAR
 from holidays.calendars.julian_revised import JULIAN_REVISED_CALENDAR
+from holidays.calendars.persian import _Persian
 from holidays.calendars.thai import _ThaiLunisolar, KHMER_CALENDAR, THAI_CALENDAR