some new features

.venv/lib/python3.12/site-packages/holidays/countries/luxembourg.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.groups import ChristianHolidays, InternationalHolidays
+from holidays.holiday_base import HolidayBase
+
+
+class Luxembourg(HolidayBase, ChristianHolidays, InternationalHolidays):
+    """Luxembourg holidays.
+
+    References:
+        * <https://en.wikipedia.org/wiki/Public_holidays_in_Luxembourg>
+    """
+
+    country = "LU"
+    default_language = "lb"
+    supported_languages = ("de", "en_US", "fr", "lb", "uk")
+
+    def __init__(self, *args, **kwargs):
+        ChristianHolidays.__init__(self)
+        InternationalHolidays.__init__(self)
+        super().__init__(*args, **kwargs)
+
+    def _populate_public_holidays(self):
+        # New Year's Day.
+        self._add_new_years_day(tr("Neijoerschdag"))
+
+        # Easter Monday.
+        self._add_easter_monday(tr("Ouschterméindeg"))
+
+        # Labor Day.
+        self._add_labor_day(tr("Dag vun der Aarbecht"))
+
+        if self._year >= 2019:
+            # Europe Day.
+            self._add_europe_day(tr("Europadag"))
+
+        # Ascension Day.
+        self._add_ascension_thursday(tr("Christi Himmelfaart"))
+
+        # Whit Monday.
+        self._add_whit_monday(tr("Péngschtméindeg"))
+
+        # National Day.
+        self._add_holiday_jun_23(tr("Nationalfeierdag"))
+
+        # Assumption Day.
+        self._add_assumption_of_mary_day(tr("Léiffrawëschdag"))
+
+        # All Saints' Day.
+        self._add_all_saints_day(tr("Allerhellgen"))
+
+        # Christmas Day.
+        self._add_christmas_day(tr("Chrëschtdag"))
+
+        # Saint Stephen's Day.
+        self._add_christmas_day_two(tr("Stiefesdag"))
+
+
+class LU(Luxembourg):
+    pass
+
+
+class LUX(Luxembourg):
+    pass