some new features

.venv/lib/python3.12/site-packages/holidays/countries/bangladesh.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 holidays.calendars.gregorian import FRI, SAT
+from holidays.groups import InternationalHolidays
+from holidays.holiday_base import HolidayBase
+
+
+class Bangladesh(HolidayBase, InternationalHolidays):
+    """Bangladesh holidays.
+
+    References:
+        * <https://web.archive.org/web/20241109215908/https://mopa.gov.bd/sites/default/files/files/mopa.gov.bd/public_holiday/61c35b73_e335_462a_9bcf_4695b23b6d82/reg4-2019-212.PDF>
+        * <https://en.wikipedia.org/wiki/Public_holidays_in_Bangladesh>
+    """
+
+    country = "BD"
+    weekend = {FRI, SAT}
+
+    def __init__(self, *args, **kwargs):
+        InternationalHolidays.__init__(self)
+        super().__init__(*args, **kwargs)
+
+    def _populate_public_holidays(self):
+        # International Mother's language Day.
+        self._add_holiday_feb_21("International Mother's language Day")
+
+        # Sheikh Mujibur Rahman's Birthday and Children's Day.
+        self._add_holiday_mar_17("Sheikh Mujibur Rahman's Birthday and Children's Day")
+
+        # Independence Day.
+        self._add_holiday_mar_26("Independence Day")
+
+        # Bengali New Year's Day.
+        self._add_holiday_apr_14("Bengali New Year's Day")
+
+        # May Day.
+        self._add_labor_day("May Day")
+
+        # National Mourning Day.
+        self._add_holiday_aug_15("National Mourning Day")
+
+        # Victory Day.
+        self._add_holiday_dec_16("Victory Day")
+
+
+class BD(Bangladesh):
+    pass
+
+
+class BGD(Bangladesh):
+    pass