Add Ghana holidays (#1639)

Co-authored-by: Arkadii Yakovets <[email protected]>

README.rst

@@ -142,7 +142,7 @@ 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 141 country codes. The standard way to refer to a country
+We currently support 142 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.
@@ -438,6 +438,11 @@ All other default values are highlighted with bold:
      - States: BB, BE, BW, BY, BYP, HB, HE, HH, MV, NI, NW, RP, SH, SL, SN, ST, TH
      - **de**, en_US, uk
      -
+   * - Ghana
+     - GH
+     -
+     - 
+     -
    * - Greece
      - GR
      -

holidays/countries/__init__.py

@@ -64,6 +64,7 @@
 from .gabon import Gabon, GA, GAB
 from .georgia import Georgia, GE, GEO
 from .germany import Germany, DE, DEU
+from .ghana import Ghana, GH, GHA
 from .greece import Greece, GR, GRC
 from .guam import Guam, GU, GUM, HolidaysGU
 from .guatemala import Guatemala, GT, GUA

holidays/countries/ghana.py

@@ -0,0 +1,97 @@
+#  python-holidays
+#  ---------------
+#  A fast, efficient Python library for generating country, province and state
+#  specific sets of holidays on the fly. It aims to make determining whether a
+#  specific date is a holiday as fast and flexible as possible.
+#
+#  Authors: dr-prodigy <[email protected]> (c) 2017-2023
+#           ryanss <[email protected]> (c) 2014-2017
+#  Website: https://github.com/dr-prodigy/python-holidays
+#  License: MIT (see LICENSE file)
+
+from holidays.groups import ChristianHolidays, InternationalHolidays, IslamicHolidays
+from holidays.observed_holiday_base import (
+    ObservedHolidayBase,
+    SAT_SUN_TO_NEXT_MON,
+    SAT_SUN_TO_NEXT_MON_TUE,
+)
+
+
+class Ghana(ObservedHolidayBase, ChristianHolidays, InternationalHolidays, IslamicHolidays):
+    """
+    https://www.mint.gov.gh/statutory-public-holidays/
+    https://en.wikipedia.org/wiki/Public_holidays_in_Ghana
+    """
+
+    country = "GH"
+    estimated_label = "%s (estimated)"
+    observed_label = "%s (observed)"
+    observed_estimated_label = "%s (observed, estimated)"
+
+    def __init__(self, *args, **kwargs):
+        ChristianHolidays.__init__(self)
+        InternationalHolidays.__init__(self)
+        IslamicHolidays.__init__(self)
+        kwargs.setdefault("observed_rule", SAT_SUN_TO_NEXT_MON)
+        super().__init__(*args, **kwargs)
+
+    def _populate_public_holidays(self):
+        # Holidays observed since 1957
+        if self._year <= 1956:
+            return None
+
+        # New Year's Day
+        self._add_observed(self._add_new_years_day("New Year's Day"))
+
+        # Constitution Day
+        if self._year >= 2019:
+            self._add_observed(self._add_holiday_jan_7("Constitution Day"))
+
+        # Independence Day
+        self._add_observed(self._add_holiday_mar_6("Independence Day"))
+
+        # Good Friday
+        self._add_good_friday("Good Friday")
+
+        # Easter Monday
+        self._add_easter_monday("Easter Monday")
+
+        # May Day(Workers' Day)
+        self._add_observed(self._add_labor_day("May Day"))
+
+        # Eid al-Fitr
+        for dt in self._add_eid_al_fitr_day("Eid ul-Fitr"):
+            self._add_observed(dt)
+
+        # Eid al-Adha
+        for dt in self._add_eid_al_adha_day("Eid ul-Adha"):
+            self._add_observed(dt)
+
+        # Founders' Day
+        if self._year >= 2019:
+            self._add_observed(self._add_holiday_aug_4("Founders' Day"))
+
+        # Kwame Nkrumah Memorial Day / Founder's Day
+        if self._year >= 2009:
+            self._add_observed(
+                self._add_holiday_sep_21(
+                    "Kwame Nkrumah Memorial Day" if self._year >= 2019 else "Founder's Day"
+                )
+            )
+
+        # Farmer's Day
+        self._add_holiday_1st_fri_of_dec("Farmer's Day")
+
+        # Christmas Day
+        self._add_observed(self._add_christmas_day("Christmas Day"), rule=SAT_SUN_TO_NEXT_MON_TUE)
+
+        # Boxing Day
+        self._add_observed(self._add_christmas_day_two("Boxing Day"), rule=SAT_SUN_TO_NEXT_MON_TUE)
+
+
+class GH(Ghana):
+    pass
+
+
+class GHA(Ghana):
+    pass

holidays/registry.py

@@ -70,6 +70,7 @@
     "gabon": ("Gabon", "GA", "GAB"),
     "georgia": ("Georgia", "GE", "GEO"),
     "germany": ("Germany", "DE", "DEU"),
+    "ghana": ("Ghana", "GH", "GHA"),
     "greece": ("Greece", "GR", "GRC"),
     "guam": ("Guam", "GU", "GUM", "HolidaysGU"),
     "guatemala": ("Guatemala", "GT", "GUA"),