some new features

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

@@ -0,0 +1,100 @@
+#  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.constants import OPTIONAL, PUBLIC
+from holidays.groups import ChristianHolidays, InternationalHolidays
+from holidays.observed_holiday_base import ObservedHolidayBase, SUN_TO_PREV_SAT, SUN_TO_NEXT_MON
+
+
+class Netherlands(ObservedHolidayBase, ChristianHolidays, InternationalHolidays):
+    """Netherlands holidays.
+
+    References:
+        * <https://en.wikipedia.org/wiki/Public_holidays_in_the_Netherlands>
+        * <https://nl.wikipedia.org/wiki/Feestdagen_in_Nederland>
+        * <https://web.archive.org/web/20250427131819/https://www.iamsterdam.com/en/plan-your-trip/practical-info/public-holidays>
+    """
+
+    country = "NL"
+    default_language = "nl"
+    supported_categories = (OPTIONAL, PUBLIC)
+    supported_languages = ("en_US", "fy", "nl", "uk")
+    start_year = 1801
+
+    def __init__(self, *args, **kwargs):
+        ChristianHolidays.__init__(self)
+        InternationalHolidays.__init__(self)
+        kwargs.setdefault("observed_rule", SUN_TO_NEXT_MON)
+        super().__init__(*args, **kwargs)
+
+    def _populate_public_holidays(self):
+        # New Year's Day.
+        self._add_new_years_day(tr("Nieuwjaarsdag"))
+
+        # Easter Sunday.
+        self._add_easter_sunday(tr("Eerste paasdag"))
+
+        # Easter Monday.
+        self._add_easter_monday(tr("Tweede paasdag"))
+
+        if self._year >= 1891:
+            name = (
+                # King's Day.
+                tr("Koningsdag")
+                if self._year >= 2014
+                # Queen's Day.
+                else tr("Koninginnedag")
+            )
+            if self._year >= 2014:
+                dt = self._add_holiday_apr_27(name)
+            elif self._year >= 1949:
+                dt = self._add_holiday_apr_30(name)
+            else:
+                dt = self._add_holiday_aug_31(name)
+            self._move_holiday(dt, rule=SUN_TO_PREV_SAT if self._year >= 1980 else SUN_TO_NEXT_MON)
+
+        if self._year >= 1950 and self._year % 5 == 0:
+            # Liberation Day.
+            self._add_holiday_may_5(tr("Bevrijdingsdag"))
+
+        # Ascension Day.
+        self._add_ascension_thursday(tr("Hemelvaartsdag"))
+
+        # Whit Sunday.
+        self._add_whit_sunday(tr("Eerste Pinksterdag"))
+
+        # Whit Monday.
+        self._add_whit_monday(tr("Tweede Pinksterdag"))
+
+        # Christmas Day.
+        self._add_christmas_day(tr("Eerste Kerstdag"))
+
+        # Second Day of Christmas.
+        self._add_christmas_day_two(tr("Tweede Kerstdag"))
+
+    def _populate_optional_holidays(self):
+        # Good Friday.
+        self._add_good_friday(tr("Goede Vrijdag"))
+
+        if self._year >= 1990:
+            # Liberation Day.
+            self._add_holiday_may_5(tr("Bevrijdingsdag"))
+
+
+class NL(Netherlands):
+    pass
+
+
+class NLD(Netherlands):
+    pass