Add London Stock Exchange (LSE) holidays

CONTRIBUTORS

@@ -54,6 +54,7 @@ Douglas Franklin
 Eden Juscelino
 Edison Robles
 Edward Betts
+Eesh Saxena
 Eldar Mustafayev
 Emmanuel Arias
 Eugenio Panadero Maciá

README.md

@@ -1994,6 +1994,13 @@ code when available. The following financial markets are available:
 <td></td>
 </tr>
 <tr>
+<td>London Stock Exchange</td>
+<td>XLON</td>
+<td>London Stock Exchange (LSE) market holidays</td>
+<td><strong>en_GB</strong>, en_US, th</td>
+<td>HALF_DAY</td>
+</tr>
+<tr>
 <td>NASDAQ</td>
 <td>XNAS</td>
 <td>National Association of Securities Dealers Automated Quotations (NASDAQ) holidays</td>

holidays/countries/united_kingdom.py

@@ -13,6 +13,7 @@
 from gettext import gettext as tr
 
 from holidays.calendars.gregorian import APR, MAY, JUN, JUL, SEP, DEC
+from holidays.constants import PUBLIC
 from holidays.groups import ChristianHolidays, InternationalHolidays, StaticHolidays
 from holidays.observed_holiday_base import (
     ObservedHolidayBase,
@@ -104,7 +105,7 @@ def _populate_common(self):
             self._add_whit_monday(tr("Whit Monday"))
 
     def _populate_subdiv_holidays(self):
-        if self.subdiv != "SCT":
+        if PUBLIC in self.categories and self.subdiv != "SCT":
             if self._year >= 1975:
                 # New Year's Day.
                 self._add_observed(self._add_new_years_day(tr("New Year's Day")))

holidays/financial/__init__.py

@@ -18,6 +18,7 @@
 from holidays.financial.hong_kong_stock_exchange import HongKongStockExchange, XHKG, HKEX, SEHK
 from holidays.financial.ice_futures_europe import IceFuturesEurope, ICEFuturesEurope, IFEU
 from holidays.financial.japan_exchange import JapanExchange, XJPX, JPX, TSE, OSE
+from holidays.financial.london_stock_exchange import LondonStockExchange, XLON, LSE
 from holidays.financial.nasdaq import NASDAQ, XNAS
 from holidays.financial.national_stock_exchange_of_india import (
     NationalStockExchangeOfIndia,

holidays/financial/london_stock_exchange.py

@@ -0,0 +1,66 @@
+#  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 HALF_DAY, PUBLIC
+from holidays.countries.united_kingdom import UnitedKingdom
+from holidays.mixins.child_entity import ChildEntity
+
+
+class LondonStockExchange(ChildEntity, UnitedKingdom):
+    """London Stock Exchange holidays.
+
+    The London Stock Exchange (LSE) is closed on the bank holidays observed in
+    England and Wales, so its public holidays are an alias of the England
+    (``ENG``) subdivision of the United Kingdom, including the one-off royal
+    bank holidays.
+
+    On Christmas Eve and New Year's Eve the exchange runs a shortened trading
+    session (a half-day closing), available under the ``HALF_DAY`` category.
+
+    References:
+        * <https://en.wikipedia.org/wiki/London_Stock_Exchange>
+        * <https://en.wikipedia.org/wiki/Bank_holiday>
+        * [LSE business days](https://www.londonstockexchange.com/equities-trading/business-days)
+    """
+
+    country = None  # type: ignore[assignment]
+    market = "XLON"
+    parent_entity = UnitedKingdom
+    parent_entity_subdivision_code = "ENG"
+    supported_categories = (HALF_DAY, PUBLIC)
+    start_year = 2000
+
+    def _populate_half_day_holidays(self):
+        # On these days the exchange runs a shortened session (a 12:30 close),
+        # exposed here under the HALF_DAY category with a label so end users can
+        # tell it apart from a full market holiday.
+
+        # %s (half-day closing).
+        half_day_closing_label = tr("%s (half-day closing)")
+
+        # Christmas Eve.
+        christmas_eve = self._format_holiday_name(half_day_closing_label, tr("Christmas Eve"))
+        self._add_christmas_eve(christmas_eve)
+
+        # New Year's Eve.
+        new_years_eve = self._format_holiday_name(half_day_closing_label, tr("New Year's Eve"))
+        self._add_new_years_eve(new_years_eve)
+
+
+class XLON(LondonStockExchange):
+    pass
+
+
+class LSE(LondonStockExchange):
+    pass

holidays/locale/en_GB/LC_MESSAGES/XLON.po

@@ -0,0 +1,41 @@
+#  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)
+#
+# London Stock Exchange holidays.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Holidays 0.100\n"
+"Report-Msgid-Bugs-To: l10n@vacanza.dev\n"
+"POT-Creation-Date: 2026-07-05 09:48+0530\n"
+"PO-Revision-Date: 2026-07-05 09:48+0530\n"
+"Last-Translator: eeshsaxena <eeshsaxena@gmail.com>\n"
+"Language-Team: Holidays Localization Team\n"
+"Language: en_GB\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: en_GB\n"
+
+#. %s (half-day closing).
+#, c-format
+msgid "%s (half-day closing)"
+msgstr ""
+
+#. Christmas Eve.
+msgid "Christmas Eve"
+msgstr ""
+
+#. New Year's Eve.
+msgid "New Year's Eve"
+msgstr ""

holidays/locale/en_US/LC_MESSAGES/XLON.po

@@ -0,0 +1,41 @@
+#  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)
+#
+# London Stock Exchange holidays en_US localization.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Holidays 0.100\n"
+"Report-Msgid-Bugs-To: l10n@vacanza.dev\n"
+"POT-Creation-Date: 2026-07-05 09:48+0530\n"
+"PO-Revision-Date: 2026-07-05 09:48+0530\n"
+"Last-Translator: eeshsaxena <eeshsaxena@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: en_GB\n"
+
+#. %s (half-day closing).
+#, c-format
+msgid "%s (half-day closing)"
+msgstr "%s (half-day closing)"
+
+#. Christmas Eve.
+msgid "Christmas Eve"
+msgstr "Christmas Eve"
+
+#. New Year's Eve.
+msgid "New Year's Eve"
+msgstr "New Year's Eve"

holidays/locale/th/LC_MESSAGES/XLON.po

@@ -0,0 +1,41 @@
+#  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)
+#
+# London Stock Exchange holidays th localization.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Holidays 0.100\n"
+"Report-Msgid-Bugs-To: l10n@vacanza.dev\n"
+"POT-Creation-Date: 2026-07-05 09:48+0530\n"
+"PO-Revision-Date: 2026-07-05 09:48+0530\n"
+"Last-Translator: eeshsaxena <eeshsaxena@gmail.com>\n"
+"Language-Team: Holidays Localization Team\n"
+"Language: th\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: en_GB\n"
+
+#. %s (half-day closing).
+#, c-format
+msgid "%s (half-day closing)"
+msgstr "%s (ปิดครึ่งวัน)"
+
+#. Christmas Eve.
+msgid "Christmas Eve"
+msgstr "วันคริสต์มาสอีฟ"
+
+#. New Year's Eve.
+msgid "New Year's Eve"
+msgstr "วันสิ้นปี"

holidays/registry.py

@@ -294,6 +294,7 @@
     "hong_kong_stock_exchange": ("HongKongStockExchange", "XHKG", "HKEX", "SEHK"),
     "ice_futures_europe": ("IceFuturesEurope", "IFEU", "ICEFuturesEurope"),
     "japan_exchange": ("JapanExchange", "XJPX", "JPX", "TSE", "OSE"),
+    "london_stock_exchange": ("LondonStockExchange", "XLON", "LSE"),
     "nasdaq": ("NASDAQ", "XNAS"),
     "national_stock_exchange_of_india": ("NationalStockExchangeOfIndia", "XNSE", "NSE"),
     "ny_stock_exchange": ("NewYorkStockExchange", "XNYS", "NYSE"),