File: sweden.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 datetime import date
from gettext import gettext as tr

from holidays.calendars.gregorian import (
    MAR,
    SUN,
    _get_all_sundays,
    _get_nth_weekday_from,
    _timedelta,
)
from holidays.constants import BANK, OPTIONAL, PUBLIC
from holidays.groups import ChristianHolidays, InternationalHolidays
from holidays.holiday_base import HolidayBase


class Sweden(HolidayBase, ChristianHolidays, InternationalHolidays):
    """Sweden holidays.

    References:
        * <https://sv.wikipedia.org/wiki/Helgdagar_i_Sverige>
        * <https://en.wikipedia.org/wiki/Public_holidays_in_Sweden>
        * [Act 1952:48](https://web.archive.org/web/20250518071409/https://blogs.loc.gov/law/2023/06/midsommar-becomes-weekend-holiday-in-sweden-in-1953-pic-of-the-week/)
        * [Act 1989:253](https://web.archive.org/web/20250414065223/https://www.riksdagen.se/sv/dokument-lagar/dokument/svensk-forfattningssamling/lag-1989253-om-allmanna-helgdagar_sfs-1989-253)
        * <https://sv.wikipedia.org/wiki/Första_maj>
        * <https://sv.wikipedia.org/wiki/Sveriges_nationaldag>
        * <https://sv.wikipedia.org/wiki/Midsommarafton>
        * [Bank Holidays 2025](https://web.archive.org/web/20250811112642/https://www.riksbank.se/sv/press-och-publicerat/kalender/helgdagar-2025/)

    In Sweden, ALL sundays are considered a holiday.
    Initialize this class with `include_sundays=False` to not include sundays as a holiday.
    """

    # %s (from 2pm).
    begin_time_label = tr("%s (från kl. 14.00)")
    country = "SE"
    default_language = "sv"
    # Act 1952:48.
    start_year = 1953
    supported_categories = (BANK, OPTIONAL, PUBLIC)
    supported_languages = ("en_US", "sv", "th", "uk")

    def __init__(self, *args, include_sundays: bool = True, **kwargs):
        """
        Args:
            include_sundays:
                Whether to consider sundays as a holiday (which they are in Sweden)
        """
        self.include_sundays = include_sundays
        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("Nyårsdagen"))

        # Epiphany.
        self._add_epiphany_day(tr("Trettondedag jul"))

        if self._year <= 1989:
            # According to Act 1952:48, Feast of the Annunciation is
            # "on the Sunday between March 22 and 28 or, if this Sunday is Palm Sunday
            # or Easter Sunday, on the Sunday before Palm Sunday".
            dt = _get_nth_weekday_from(1, SUN, date(self._year, MAR, 22))
            self._add_holiday(
                # Feast of the Annunciation.
                tr("Marie bebådelsedag"),
                _timedelta(self._easter_sunday, -14)
                if dt == _timedelta(self._easter_sunday, -7) or dt == self._easter_sunday
                else dt,
            )

        # Good Friday.
        self._add_good_friday(tr("Långfredagen"))

        # Easter Sunday.
        self._add_easter_sunday(tr("Påskdagen"))

        # Easter Monday.
        self._add_easter_monday(tr("Annandag påsk"))

        # May Day.
        self._add_labor_day(tr("Första maj"))

        # Ascension Day.
        self._add_ascension_thursday(tr("Kristi himmelsfärdsdag"))

        if self._year >= 2005:
            # National Day.
            self._add_holiday_jun_6(tr("Nationaldagen"))

        # Whit Sunday.
        self._add_whit_sunday(tr("Pingstdagen"))

        if self._year <= 2004:
            # Whit Monday.
            self._add_whit_monday(tr("Annandag pingst"))

        # Midsummer Day.
        self._add_holiday_1st_sat_from_jun_20(tr("Midsommardagen"))

        # All Saints' Day.
        self._add_holiday_1st_sat_from_oct_31(tr("Alla helgons dag"))

        # Christmas Day.
        self._add_christmas_day(tr("Juldagen"))

        # Second Day of Christmas.
        self._add_christmas_day_two(tr("Annandag jul"))

        # Optionally add all Sundays of the year.
        if self.include_sundays:
            for dt in _get_all_sundays(self._year):
                # Sunday.
                self._add_holiday(tr("Söndag"), dt)

    def _populate_common(self):
        """Populate holidays that are both optional and bank holidays."""

        # Twelfth Night.
        self._add_holiday_jan_5(self.tr(self.begin_time_label) % self.tr("Trettondagsafton"))

        # Maundy Thursday.
        self._add_holy_thursday(self.tr(self.begin_time_label) % self.tr("Skärtorsdagen"))

        # Walpurgis Night.
        self._add_holiday_apr_30(self.tr(self.begin_time_label) % self.tr("Valborgsmässoafton"))

        # Midsummer Eve.
        self._add_holiday_1st_fri_from_jun_19(tr("Midsommarafton"))

        self._add_holiday_1st_fri_from_oct_30(
            # All Saints' Eve.
            self.tr(self.begin_time_label) % self.tr("Allahelgonsafton")
        )

        # Christmas Eve.
        self._add_christmas_eve(tr("Julafton"))

        # New Year's Eve.
        self._add_new_years_eve(tr("Nyårsafton"))

    def _populate_bank_holidays(self):
        self._populate_common()

        self._add_holiday_38_days_past_easter(
            # Day before Ascension Day.
            self.tr(self.begin_time_label) % self.tr("Dag före Kristi himmelsfärdsdag")
        )

        self._add_holiday_1st_thu_from_jun_18(
            # Day before Midsummer Eve.
            self.tr(self.begin_time_label) % self.tr("Dag före Midsommarafton")
        )

        self._add_holiday_47_days_past_easter(
            # Day before Whitsun Eve.
            self.tr(self.begin_time_label) % self.tr("Dag före Pingstafton")
        )

        # Day before Christmas Eve.
        self._add_holiday_dec_23(self.tr(self.begin_time_label) % self.tr("Dag före Julafton"))

        # Day before New Year's Eve.
        self._add_holiday_dec_30(self.tr(self.begin_time_label) % self.tr("Dag före Nyårsafton"))

    def _populate_optional_holidays(self):
        self._populate_common()

        # Holy Saturday.
        self._add_holy_saturday(tr("Påskafton"))

        # Days between a holiday and a weekend are in Swedish called "klämdagar" (squeeze days).
        # There is one permanent "klämdag" every year - Friday after Ascension Day.

        # Squeeze day.
        self._add_holiday_40_days_past_easter(tr("Klämdag"))

        # Whitsun Eve.
        self._add_holiday_48_days_past_easter(tr("Pingstafton"))


class SE(Sweden):
    pass


class SWE(Sweden):
    pass