some new features

.venv/lib/python3.12/site-packages/holidays/countries/lithuania.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 Lithuania(HolidayBase, ChristianHolidays, InternationalHolidays):
+    """Lithuania holidays.
+
+    References:
+        * <https://en.wikipedia.org/wiki/Public_holidays_in_Lithuania>
+        * <https://web.archive.org/web/20250415141132/https://www.kalendorius.today/>
+    """
+
+    country = "LT"
+    default_language = "lt"
+    supported_languages = ("en_US", "lt", "uk")
+    start_year = 1990
+
+    def __init__(self, *args, **kwargs) -> None:
+        ChristianHolidays.__init__(self)
+        InternationalHolidays.__init__(self)
+        super().__init__(*args, **kwargs)
+
+    def _populate_public_holidays(self) -> None:
+        # New Year's Day.
+        self._add_new_years_day(tr("Naujųjų metų diena"))
+
+        # Day of Restoration of the State of Lithuania.
+        self._add_holiday_feb_16(tr("Lietuvos valstybės atkūrimo diena"))
+
+        # Day of Restoration of Independence of Lithuania.
+        self._add_holiday_mar_11(tr("Lietuvos nepriklausomybės atkūrimo diena"))
+
+        # Easter Sunday.
+        self._add_easter_sunday(tr("Šv. Velykos"))
+
+        # Easter Monday.
+        self._add_easter_monday(tr("Antroji šv. Velykų diena"))
+
+        # International Workers' Day.
+        self._add_labor_day(tr("Tarptautinė darbo diena"))
+
+        # Mother's Day.
+        self._add_holiday_1st_sun_of_may(tr("Motinos diena"))
+
+        # Father's Day.
+        self._add_holiday_1st_sun_of_jun(tr("Tėvo diena"))
+
+        if self._year >= 2003:
+            # Day of Dew and Saint John.
+            self._add_saint_johns_day(tr("Rasos ir Joninių diena"))
+
+        if self._year >= 1991:
+            self._add_holiday_jul_6(
+                # Statehood Day.
+                tr("Valstybės (Lietuvos karaliaus Mindaugo karūnavimo) ir Tautiškos giesmės diena")
+            )
+
+        # Assumption Day.
+        self._add_assumption_of_mary_day(tr("Žolinė (Švč. Mergelės Marijos ėmimo į dangų diena)"))
+
+        # All Saints' Day.
+        self._add_all_saints_day(tr("Visų Šventųjų diena"))
+
+        if self._year >= 2020:
+            # All Souls' Day.
+            self._add_all_souls_day(tr("Mirusiųjų atminimo (Vėlinių) diena"))
+
+        # Christmas Eve.
+        self._add_christmas_eve(tr("Kūčių diena"))
+
+        # Christmas Day.
+        self._add_christmas_day(tr("Šv. Kalėdų pirma diena"))
+
+        # Second Day of Christmas.
+        self._add_christmas_day_two(tr("Šv. Kalėdų antra diena"))
+
+
+class LT(Lithuania):
+    pass
+
+
+class LTU(Lithuania):
+    pass