some new features

.venv/lib/python3.12/site-packages/holidays/countries/isle_of_man.py

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+#  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: Vacanza Team and individual contributors (see CONTRIBUTORS file)
+#           dr-prodigy <dr.prodigy.github@gmail.com> (c) 2017-2023
+#           ryanss <ryanssdev@icloud.com> (c) 2014-2017
+#  Website: https://github.com/vacanza/holidays
+#  License: MIT (see LICENSE file)
+
+from gettext import gettext as tr
+
+from holidays.countries.united_kingdom import UnitedKingdom, UnitedKingdomStaticHolidays
+from holidays.groups import ChristianHolidays, InternationalHolidays, StaticHolidays
+from holidays.observed_holiday_base import ObservedHolidayBase, SAT_SUN_TO_NEXT_MON
+
+
+class IsleOfMan(UnitedKingdom):
+    """Isle Of Man holidays."""
+
+    country = "IM"
+    # The Isle of Man (IM) is not a subdivision of the United Kingdom (GB)
+    # entity, so the `IsleOfMan` class does not inherit from the `ChildEntity`
+    # mixin. The `parent_entity` is specified below solely to maintain
+    # consistency in holiday name localization.
+    parent_entity = UnitedKingdom
+    subdivisions = ()  # Override UnitedKingdom subdivisions.
+    subdivisions_aliases = {}  # Override UnitedKingdom subdivisions aliases.
+
+    def __init__(self, *args, **kwargs):  # Override UnitedKingdom __init__().
+        ChristianHolidays.__init__(self)
+        InternationalHolidays.__init__(self)
+        StaticHolidays.__init__(self, UnitedKingdomStaticHolidays)
+        kwargs.setdefault("observed_rule", SAT_SUN_TO_NEXT_MON)
+        ObservedHolidayBase.__init__(self, *args, **kwargs)
+
+    def _populate_public_holidays(self) -> None:
+        super()._populate_public_holidays()
+        # Easter Monday.
+        self._add_easter_monday(tr("Easter Monday"))
+
+        if self._year <= 1970:
+            # Whit Monday.
+            self._add_whit_monday(tr("Whit Monday"))
+
+        if self._year >= 1971:
+            # Late Summer Bank Holiday.
+            self._add_holiday_last_mon_of_aug(tr("Late Summer Bank Holiday"))
+
+        # Isle of Man exclusive holidays
+
+        # TT Bank Holiday.
+        self._add_holiday_1st_fri_of_jun(tr("TT Bank Holiday"))
+
+        # Tynwald Day.
+        jul_5 = self._add_holiday_jul_5(tr("Tynwald Day"))
+        if self._year >= 1992:
+            # Move to the next Monday if falls on a weekend.
+            self._move_holiday(jul_5, show_observed_label=False)
+
+
+class IM(IsleOfMan):
+    pass
+
+
+class IMN(IsleOfMan):
+    pass