Add SIX Swiss Exchange (SIX) holidays

README.md

@@ -2038,6 +2038,13 @@ code when available. The following financial markets are available:
 <td></td>
 </tr>
 <tr>
+<td>SIX Swiss Exchange</td>
+<td>XSWX</td>
+<td>SIX Swiss Exchange market holidays</td>
+<td><strong>de</strong>, en_US, fr, it, th, uk</td>
+<td></td>
+</tr>
+<tr>
 <td>Toronto Stock Exchange</td>
 <td>XTSE</td>
 <td>Toronto Stock Exchange (TSX) market holidays</td>

holidays/countries/jersey.py

@@ -18,8 +18,8 @@
     ObservedHolidayBase,
     SAT_SUN_TO_NEXT_WORKDAY,
     SUN_TO_NEXT_WORKDAY,
-    SAT_TO_NONE,
     SUN_TO_NONE,
+    SAT_SUN_TO_NONE,
 )
 
 
@@ -145,7 +145,7 @@ def _populate_public_holidays(self) -> None:
         self._add_observed(
             # Liberation Day
             self._add_holiday_may_9("Liberation Day"),
-            rule=SAT_TO_NONE + SUN_TO_NONE if self._year <= 2010 else SUN_TO_NONE,
+            rule=SAT_SUN_TO_NONE if self._year <= 2010 else SUN_TO_NONE,
         )
 
 

holidays/countries/macau.py

@@ -24,8 +24,7 @@
     ObservedHolidayBase,
     SUN_TO_NEXT_WORKDAY,
     SAT_SUN_TO_NEXT_WORKDAY,
-    SAT_TO_NONE,
-    SUN_TO_NONE,
+    SAT_SUN_TO_NONE,
 )
 
 
@@ -358,7 +357,7 @@ def _populate_government_holidays(self):
             self._move_holiday(
                 # New Year's Eve.
                 self._add_new_years_eve(self._format_holiday_name(begin_time_label, tr("除夕"))),
-                rule=SAT_TO_NONE + SUN_TO_NONE,
+                rule=SAT_SUN_TO_NONE,
             )
 
         if self.observed:

holidays/countries/switzerland.py

@@ -20,7 +20,7 @@
     MON_ONLY,
     TUE_TO_NONE,
     SAT_TO_NONE,
-    SUN_TO_NONE,
+    SAT_SUN_TO_NONE,
     ALL_TO_NEXT_MON,
 )
 
@@ -44,7 +44,7 @@ class Switzerland(ObservedHolidayBase, ChristianHolidays, InternationalHolidays)
     country = "CH"
     default_language = "de"
     start_year = 1801
-    subdivisions = (
+    subdivisions: tuple[str, ...] = (
         # Cantons.
         "AG",  # Aargau.
         "AI",  # Appenzell Innerrhoden.
@@ -111,7 +111,7 @@ class Switzerland(ObservedHolidayBase, ChristianHolidays, InternationalHolidays)
         # Cities.
         "Stadt Zürich": "Stadt Zurich",
     }
-    supported_categories = (DE_FACTO, HALF_DAY, OPTIONAL, PUBLIC)
+    supported_categories: tuple[str, ...] = (DE_FACTO, HALF_DAY, OPTIONAL, PUBLIC)
     supported_languages = ("de", "en_US", "fr", "it", "th", "uk")
 
     def __init__(self, *args, **kwargs):
@@ -811,10 +811,10 @@ def _populate_subdiv_stadt_zurich_optional_holidays(self):
 
         # Bridge Holiday.
         name = tr("Brückentag")
-        self._add_observed(self._add_holiday_dec_27(name), rule=SAT_TO_NONE + SUN_TO_NONE)
-        self._add_observed(self._add_holiday_dec_28(name), rule=SAT_TO_NONE + SUN_TO_NONE)
-        self._add_observed(self._add_holiday_dec_29(name), rule=SAT_TO_NONE + SUN_TO_NONE)
-        self._add_observed(self._add_holiday_dec_30(name), rule=SAT_TO_NONE + SUN_TO_NONE)
+        self._add_observed(self._add_holiday_dec_27(name), rule=SAT_SUN_TO_NONE)
+        self._add_observed(self._add_holiday_dec_28(name), rule=SAT_SUN_TO_NONE)
+        self._add_observed(self._add_holiday_dec_29(name), rule=SAT_SUN_TO_NONE)
+        self._add_observed(self._add_holiday_dec_30(name), rule=SAT_SUN_TO_NONE)
 
     @property
     def _vernal_equinox_date(self) -> tuple[int, int]:

holidays/financial/__init__.py

@@ -28,4 +28,5 @@
 from holidays.financial.ny_stock_exchange import NewYorkStockExchange, XNYS, NYSE
 from holidays.financial.shanghai_stock_exchange import ShanghaiStockExchange, XSHG, SSE
 from holidays.financial.shenzhen_stock_exchange import ShenzhenStockExchange, XSHE, SZSE
+from holidays.financial.six_swiss_exchange import SIXSwissExchange, XSWX, SIX
 from holidays.financial.toronto_stock_exchange import TorontoStockExchange, XTSE, TSX

holidays/financial/bolsa_mexicana_de_valores.py

@@ -14,7 +14,7 @@
 
 from holidays.calendars.gregorian import SEP
 from holidays.groups import ChristianHolidays, InternationalHolidays, StaticHolidays
-from holidays.observed_holiday_base import ObservedHolidayBase, SAT_TO_NONE, SUN_TO_NONE
+from holidays.observed_holiday_base import ObservedHolidayBase, SAT_SUN_TO_NONE
 
 
 class BolsaMexicanaDeValores(
@@ -63,7 +63,7 @@ def __init__(self, *args, **kwargs):
         ChristianHolidays.__init__(self)
         InternationalHolidays.__init__(self)
         StaticHolidays.__init__(self, BolsaMexicanaDeValoresStaticHolidays)
-        kwargs.setdefault("observed_rule", SAT_TO_NONE + SUN_TO_NONE)
+        kwargs.setdefault("observed_rule", SAT_SUN_TO_NONE)
         super().__init__(*args, **kwargs)
 
     def _populate_public_holidays(self):

holidays/financial/national_stock_exchange_of_india.py

@@ -20,7 +20,7 @@
     IslamicHolidays,
     StaticHolidays,
 )
-from holidays.observed_holiday_base import ObservedHolidayBase, SAT_TO_NONE, SUN_TO_NONE
+from holidays.observed_holiday_base import ObservedHolidayBase, SAT_SUN_TO_NONE
 
 
 class NationalStockExchangeOfIndia(
@@ -85,7 +85,7 @@ def __init__(self, *args, islamic_show_estimated: bool = True, **kwargs):
             calendar_delta_days=+1,
         )
         StaticHolidays.__init__(self, cls=NationalStockExchangeOfIndiaStaticHolidays)
-        kwargs.setdefault("observed_rule", SAT_TO_NONE + SUN_TO_NONE)
+        kwargs.setdefault("observed_rule", SAT_SUN_TO_NONE)
         super().__init__(*args, **kwargs)
 
     def _populate_public_holidays(self):

holidays/financial/six_swiss_exchange.py

@@ -0,0 +1,67 @@
+#  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.constants import PUBLIC
+from holidays.countries.switzerland import Switzerland
+from holidays.mixins.child_entity import ChildEntity
+
+
+class SIXSwissExchange(ChildEntity, Switzerland):
+    """SIX Swiss Exchange (SIX) holidays.
+
+    References:
+        [2018](https://web.archive.org/web/20260712044834/https://www.six-group.com/dam/download/sites/education/preparatory-documentation/trading-module/trading-guide.pdf)
+        [2019](https://web.archive.org/web/20260712044834/https://www.six-group.com/dam/download/sites/education/preparatory-documentation/trading-module/trading-guide.pdf)
+        [2021](https://web.archive.org/web/20211102133818/https://www.six-group.com/dam/download/the-swiss-stock-exchange/trading/trading-provisions/regulation/trading-guides/trading-calendar-2021.pdf)
+        [2022](https://web.archive.org/web/20220420104843/https://www.six-group.com/dam/download/the-swiss-stock-exchange/trading/trading-provisions/regulation/trading-guides/trading-calendar-2022.pdf)
+        [2023](https://web.archive.org/web/20220626051815/https://www.six-group.com/dam/download/the-swiss-stock-exchange/trading/trading-provisions/regulation/trading-guides/trading-calendar-2023.pdf)
+        [2024](https://web.archive.org/web/20240521040627/https://www.six-group.com/dam/download/the-swiss-stock-exchange/trading/trading-provisions/regulation/trading-guides/trading-calendar-2024.pdf)
+        [2025](https://web.archive.org/web/20250908065713/https://www.six-group.com/dam/download/the-swiss-stock-exchange/trading/trading-provisions/regulation/trading-guides/trading-calendar-2025.pdf)
+        [2026](https://web.archive.org/web/20251225182641/https://www.six-group.com/dam/download/the-swiss-stock-exchange/trading/trading-provisions/regulation/trading-guides/trading-calendar-2026.pdf)
+    """
+
+    country = None  # type: ignore[assignment]
+    market = "XSWX"
+    parent_entity = Switzerland
+    parent_entity_subdivision_code = "ZH"
+    supported_categories: tuple[str] = (PUBLIC,)
+    start_year = 2000
+
+    def _add_holiday(self, name: str, *args) -> date | None:
+        dt = args if len(args) > 1 else args[0]
+        dt = dt if isinstance(dt, date) else date(self._year, *dt)
+        if self._is_weekend(dt):
+            return None
+        return super()._add_holiday(name, dt)
+
+    def _populate_public_holidays(self) -> None:
+        super()._populate_public_holidays()
+
+        # Saint Berchtold's Day.
+        self._add_new_years_day_two(tr("Berchtoldstag"))
+
+        # Christmas Eve.
+        self._add_christmas_eve(tr("Heiligabend"))
+
+        # New Year's Eve.
+        self._add_new_years_eve(tr("Vortag vor Neujahr"))
+
+
+class XSWX(SIXSwissExchange):
+    pass
+
+
+class SIX(SIXSwissExchange):
+    pass

holidays/financial/toronto_stock_exchange.py

@@ -20,8 +20,7 @@
     SAT_SUN_TO_NEXT_MON_TUE,
     SAT_SUN_TO_NEXT_MON,
     MON_TO_NEXT_TUE,
-    SAT_TO_NONE,
-    SUN_TO_NONE,
+    SAT_SUN_TO_NONE,
 )
 
 
@@ -118,7 +117,7 @@ def _populate_half_day_holidays(self):
         self._move_holiday(
             # Christmas Eve.
             self._add_christmas_eve(self._format_holiday_name(pause_label, tr("Christmas Eve"))),
-            rule=SAT_TO_NONE + SUN_TO_NONE,
+            rule=SAT_SUN_TO_NONE,
         )
 
 

holidays/locale/de/LC_MESSAGES/XSWX.po

@@ -0,0 +1,40 @@
+#  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)
+#
+# SIX Swiss Exchange (SIX) holidays.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Holidays 0.101\n"
+"Report-Msgid-Bugs-To: l10n@vacanza.dev\n"
+"POT-Creation-Date: 2026-07-11 00:25+0000\n"
+"PO-Revision-Date: 2026-07-12 13:15+0000\n"
+"Last-Translator: Paresh Joshi <pareshjoshij@gmail.com>\n"
+"Language-Team: Holidays Localization Team\n"
+"Language: de\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Generated-By: Lingva 5.0.6\n"
+"X-Source-Language: de\n"
+
+#. Saint Berchtold's Day.
+msgid "Berchtoldstag"
+msgstr ""
+
+#. Christmas Eve.
+msgid "Heiligabend"
+msgstr ""
+
+#. New Year's Eve.
+msgid "Vortag vor Neujahr"
+msgstr ""

holidays/locale/en_US/LC_MESSAGES/XSWX.po

@@ -0,0 +1,40 @@
+#  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)
+#
+# SIX Swiss Exchange (SIX) holidays en_US localization.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Holidays 0.101\n"
+"Report-Msgid-Bugs-To: l10n@vacanza.dev\n"
+"POT-Creation-Date: 2026-07-11 00:25+0000\n"
+"PO-Revision-Date: 2026-07-12 13:15+0000\n"
+"Last-Translator: Paresh Joshi <pareshjoshij@gmail.com>\n"
+"Language-Team: Holidays Localization Team\n"
+"Language: en_US\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Generated-By: Lingva 5.0.6\n"
+"X-Source-Language: de\n"
+
+#. Saint Berchtold's Day.
+msgid "Berchtoldstag"
+msgstr "Saint Berchtold's Day"
+
+#. Christmas Eve.
+msgid "Heiligabend"
+msgstr "Christmas Eve"
+
+#. New Year's Eve.
+msgid "Vortag vor Neujahr"
+msgstr "New Year's Eve"

holidays/locale/fr/LC_MESSAGES/XSWX.po

@@ -0,0 +1,40 @@
+#  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)
+#
+# SIX Swiss Exchange (SIX) holidays fr localization.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Holidays 0.101\n"
+"Report-Msgid-Bugs-To: l10n@vacanza.dev\n"
+"POT-Creation-Date: 2026-07-11 00:25+0000\n"
+"PO-Revision-Date: 2026-07-12 13:15+0000\n"
+"Last-Translator: Paresh Joshi <pareshjoshij@gmail.com>\n"
+"Language-Team: Holidays Localization Team\n"
+"Language: fr\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Generated-By: Lingva 5.0.6\n"
+"X-Source-Language: de\n"
+
+#. Saint Berchtold's Day.
+msgid "Berchtoldstag"
+msgstr "Saint-Berchtold"
+
+#. Christmas Eve.
+msgid "Heiligabend"
+msgstr "Veille de Noël"
+
+#. New Year's Eve.
+msgid "Vortag vor Neujahr"
+msgstr "Réveillon de la Saint-Sylvestre"

holidays/locale/it/LC_MESSAGES/XSWX.po

@@ -0,0 +1,40 @@
+#  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)
+#
+# SIX Swiss Exchange (SIX) holidays it localization.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Holidays 0.101\n"
+"Report-Msgid-Bugs-To: l10n@vacanza.dev\n"
+"POT-Creation-Date: 2026-07-11 00:25+0000\n"
+"PO-Revision-Date: 2026-07-12 13:15+0000\n"
+"Last-Translator: Paresh Joshi <pareshjoshij@gmail.com>\n"
+"Language-Team: Holidays Localization Team\n"
+"Language: it\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Generated-By: Lingva 5.0.6\n"
+"X-Source-Language: de\n"
+
+#. Saint Berchtold's Day.
+msgid "Berchtoldstag"
+msgstr "Giorno di Bertoldo"
+
+#. Christmas Eve.
+msgid "Heiligabend"
+msgstr "Vigilia di Natale"
+
+#. New Year's Eve.
+msgid "Vortag vor Neujahr"
+msgstr "Vigilia di Capodanno"