diff --git a/holidays/countries/angola.py b/holidays/countries/angola.py
index a718eb38b..de75eaaf1 100644
--- a/holidays/countries/angola.py
+++ b/holidays/countries/angola.py
@@ -14,7 +14,7 @@
 from typing import Tuple
 
 from holidays.calendars.gregorian import AUG, SEP, DEC
-from holidays.groups import ChristianHolidays, InternationalHolidays
+from holidays.groups import ChristianHolidays, InternationalHolidays, StaticHolidays
 from holidays.observed_holiday_base import (
     ObservedHolidayBase,
     TUE_TO_PREV_MON,
@@ -23,7 +23,7 @@
 )
 
 
-class Angola(ObservedHolidayBase, ChristianHolidays, InternationalHolidays):
+class Angola(ObservedHolidayBase, ChristianHolidays, InternationalHolidays, StaticHolidays):
     """
     References:
     - https://en.wikipedia.org/wiki/Public_holidays_in_Angola
@@ -45,14 +45,11 @@ class Angola(ObservedHolidayBase, ChristianHolidays, InternationalHolidays):
     supported_languages = ("en_US", "pt_AO", "uk")
     # %s (Observed).
     observed_label = tr("%s (Ponte)")
-    special_holidays = {
-        # General Election Day.
-        2017: (AUG, 23, tr("Dia de eleições gerais")),
-    }
 
     def __init__(self, *args, **kwargs):
         ChristianHolidays.__init__(self)
         InternationalHolidays.__init__(self)
+        StaticHolidays.__init__(self, cls=AngolaStaticHolidays)
         super().__init__(observed_rule=TUE_TO_PREV_MON + THU_TO_NEXT_FRI, *args, **kwargs)
 
     def _is_observed(self, dt: date) -> bool:
@@ -188,3 +185,10 @@ class AO(Angola):
 
 class AGO(Angola):
     pass
+
+
+class AngolaStaticHolidays:
+    special_holidays = {
+        # General Election Day.
+        2017: (AUG, 23, tr("Dia de eleições gerais")),
+    }
diff --git a/holidays/countries/brunei.py b/holidays/countries/brunei.py
index 102fce96d..66d9da6ac 100644
--- a/holidays/countries/brunei.py
+++ b/holidays/countries/brunei.py
@@ -18,6 +18,7 @@
     ChristianHolidays,
     InternationalHolidays,
     IslamicHolidays,
+    StaticHolidays,
 )
 from holidays.observed_holiday_base import (
     ObservedHolidayBase,
@@ -35,6 +36,7 @@ class Brunei(
     ChristianHolidays,
     InternationalHolidays,
     IslamicHolidays,
+    StaticHolidays,
 ):
     """
     A subclass of :py:class:`HolidayBase` representing public holidays in Brunei Darussalam.
@@ -69,16 +71,12 @@ class Brunei(
     observed_label = tr("%s - Diperhatikan")
     supported_languages = ("en_US", "ms", "th")
 
-    special_holidays = {
-        # Sultan Hassanal Bolkiah's Golden Jubilee celebration
-        2017: (OCT, 5, tr("Jubli Emas Sultan Hassanal Bolkiah")),
-    }
-
     def __init__(self, *args, **kwargs):
         ChineseCalendarHolidays.__init__(self)
         ChristianHolidays.__init__(self)
         InternationalHolidays.__init__(self)
         IslamicHolidays.__init__(self, cls=BruneiIslamicHolidays)
+        StaticHolidays.__init__(self, cls=BruneiStaticHolidays)
         super().__init__(observed_rule=FRI_SUN_TO_NEXT_SAT_MON, *args, **kwargs)
 
     def _populate(self, year):
@@ -394,3 +392,10 @@ class BruneiIslamicHolidays(_CustomIslamicHolidays):
         2022: (APR, 3),
         2023: (MAR, 23),
     }
+
+
+class BruneiStaticHolidays:
+    special_holidays = {
+        # Sultan Hassanal Bolkiah's Golden Jubilee celebration
+        2017: (OCT, 5, tr("Jubli Emas Sultan Hassanal Bolkiah")),
+    }
diff --git a/holidays/countries/cambodia.py b/holidays/countries/cambodia.py
index 23e8450db..35b913e22 100644
--- a/holidays/countries/cambodia.py
+++ b/holidays/countries/cambodia.py
@@ -54,7 +54,7 @@ class Cambodia(HolidayBase, InternationalHolidays, StaticHolidays, ThaiCalendarH
 
     def __init__(self, *args, **kwargs):
         InternationalHolidays.__init__(self)
-        StaticHolidays.__init__(self, CameroonStaticHolidays)
+        StaticHolidays.__init__(self, cls=CambodiaStaticHolidays)
         ThaiCalendarHolidays.__init__(self, KHMER_CALENDAR)
         super().__init__(*args, **kwargs)
 
@@ -281,7 +281,7 @@ class KHM(Cambodia):
     pass
 
 
-class CameroonStaticHolidays:
+class CambodiaStaticHolidays:
     sangkranta_in_lieu_covid = tr(
         # Khmer New Year's Replacement Holiday
         "ថ្ងៃឈប់សម្រាកសងជំនួសឲ្យពិធីបុណ្យចូលឆ្នាំថ្មីប្រពៃណីជាតិ"
diff --git a/holidays/countries/cameroon.py b/holidays/countries/cameroon.py
index 27c77a324..ddcdea669 100644
--- a/holidays/countries/cameroon.py
+++ b/holidays/countries/cameroon.py
@@ -11,11 +11,18 @@
 
 from holidays.calendars import _CustomIslamicHolidays
 from holidays.calendars.gregorian import JAN, FEB, MAR, APR, MAY, JUN, JUL, AUG, SEP, OCT, NOV, DEC
-from holidays.groups import ChristianHolidays, InternationalHolidays, IslamicHolidays
+from holidays.groups import (
+    ChristianHolidays,
+    InternationalHolidays,
+    IslamicHolidays,
+    StaticHolidays,
+)
 from holidays.observed_holiday_base import ObservedHolidayBase, SUN_TO_NEXT_WORKDAY
 
 
-class Cameroon(ObservedHolidayBase, ChristianHolidays, InternationalHolidays, IslamicHolidays):
+class Cameroon(
+    ObservedHolidayBase, ChristianHolidays, InternationalHolidays, IslamicHolidays, StaticHolidays
+):
     """
     References:
       - https://en.wikipedia.org/wiki/Public_holidays_in_Cameroon
@@ -25,17 +32,12 @@ class Cameroon(ObservedHolidayBase, ChristianHolidays, InternationalHolidays, Is
 
     country = "CM"
     observed_label = "%s (Observed)"
-    special_holidays = {
-        2021: (
-            (MAY, 14, "Public Holiday"),
-            (JUL, 19, "Public Holiday"),
-        ),
-    }
 
     def __init__(self, *args, **kwargs):
         ChristianHolidays.__init__(self)
         InternationalHolidays.__init__(self)
         IslamicHolidays.__init__(self, cls=CameroonIslamicHolidays)
+        StaticHolidays.__init__(self, cls=CameroonStaticHolidays)
         super().__init__(observed_rule=SUN_TO_NEXT_WORKDAY, *args, **kwargs)
 
     def _populate(self, year):
@@ -174,3 +176,12 @@ class CameroonIslamicHolidays(_CustomIslamicHolidays):
         2021: (OCT, 19),
         2022: (OCT, 8),
     }
+
+
+class CameroonStaticHolidays:
+    special_holidays = {
+        2021: (
+            (MAY, 14, "Public Holiday"),
+            (JUL, 19, "Public Holiday"),
+        ),
+    }
diff --git a/holidays/countries/china.py b/holidays/countries/china.py
index fe0a6415f..09d6888d3 100644
--- a/holidays/countries/china.py
+++ b/holidays/countries/china.py
@@ -15,11 +15,11 @@
 
 from holidays.calendars.gregorian import JAN, MAY, SEP, OCT, DEC
 from holidays.constants import HALF_DAY, PUBLIC
-from holidays.groups import ChineseCalendarHolidays, InternationalHolidays
+from holidays.groups import ChineseCalendarHolidays, InternationalHolidays, StaticHolidays
 from holidays.holiday_base import HolidayBase
 
 
-class China(HolidayBase, ChineseCalendarHolidays, InternationalHolidays):
+class China(HolidayBase, ChineseCalendarHolidays, InternationalHolidays, StaticHolidays):
     """
     References:
     - https://en.wikipedia.org/wiki/Public_holidays_in_China
@@ -66,58 +66,10 @@ class China(HolidayBase, ChineseCalendarHolidays, InternationalHolidays):
     default_language = "zh_CN"
     supported_languages = ("en_US", "th", "zh_CN", "zh_TW")
 
-    # Special Cases.
-
-    # New Year's Day.
-    new_years_day_overflow = tr("元旦")
-
-    # National Day.
-    national_day_2008_golden_week = tr("国庆节")
-
-    # Mid-Autumn Festival.
-    mid_autumn_festival_2010_special = tr("中秋节")
-
-    special_public_holidays = {
-        2007: (
-            # 2007: Overflow from 2008 Notice.
-            (DEC, 30, new_years_day_overflow),
-            (DEC, 31, new_years_day_overflow),
-        ),
-        2008: (
-            # 2008: weird National Day Golden Week pattern.
-            (SEP, 29, national_day_2008_golden_week),
-            (SEP, 30, national_day_2008_golden_week),
-            (OCT, 4, national_day_2008_golden_week),
-            (OCT, 5, national_day_2008_golden_week),
-        ),
-        2010: (
-            # 2010: doesn't fit with existing observed pattern.
-            (SEP, 23, mid_autumn_festival_2010_special),
-            (SEP, 24, mid_autumn_festival_2010_special),
-        ),
-        2013: (
-            # 2013: doesn't fit with existing observed pattern.
-            (JAN, 2, new_years_day_overflow),
-            (JAN, 3, new_years_day_overflow),
-        ),
-        2018: (
-            # 2018: Overflow from 2019 Notice.
-            (DEC, 30, new_years_day_overflow),
-            (DEC, 31, new_years_day_overflow),
-        ),
-        2022: (
-            # 2022: Overflow from 2023 Notice.
-            (DEC, 31, new_years_day_overflow),
-        ),
-        2023: (
-            # 2023: Overflow from 2023 Notice.
-            (JAN, 2, new_years_day_overflow),
-        ),
-    }
-
     def __init__(self, *args, **kwargs):
         ChineseCalendarHolidays.__init__(self)
         InternationalHolidays.__init__(self)
+        StaticHolidays.__init__(self, cls=ChinaStaticHolidays)
         super().__init__(*args, **kwargs)
 
     def _add_observed_one_off_holidays(self, dt: date):
@@ -372,3 +324,54 @@ class CN(China):
 
 class CHN(China):
     pass
+
+
+class ChinaStaticHolidays:
+    # Special Cases.
+
+    # New Year's Day.
+    new_years_day_overflow = tr("元旦")
+
+    # National Day.
+    national_day_2008_golden_week = tr("国庆节")
+
+    # Mid-Autumn Festival.
+    mid_autumn_festival_2010_special = tr("中秋节")
+
+    special_public_holidays = {
+        2007: (
+            # 2007: Overflow from 2008 Notice.
+            (DEC, 30, new_years_day_overflow),
+            (DEC, 31, new_years_day_overflow),
+        ),
+        2008: (
+            # 2008: weird National Day Golden Week pattern.
+            (SEP, 29, national_day_2008_golden_week),
+            (SEP, 30, national_day_2008_golden_week),
+            (OCT, 4, national_day_2008_golden_week),
+            (OCT, 5, national_day_2008_golden_week),
+        ),
+        2010: (
+            # 2010: doesn't fit with existing observed pattern.
+            (SEP, 23, mid_autumn_festival_2010_special),
+            (SEP, 24, mid_autumn_festival_2010_special),
+        ),
+        2013: (
+            # 2013: doesn't fit with existing observed pattern.
+            (JAN, 2, new_years_day_overflow),
+            (JAN, 3, new_years_day_overflow),
+        ),
+        2018: (
+            # 2018: Overflow from 2019 Notice.
+            (DEC, 30, new_years_day_overflow),
+            (DEC, 31, new_years_day_overflow),
+        ),
+        2022: (
+            # 2022: Overflow from 2023 Notice.
+            (DEC, 31, new_years_day_overflow),
+        ),
+        2023: (
+            # 2023: Overflow from 2023 Notice.
+            (JAN, 2, new_years_day_overflow),
+        ),
+    }
diff --git a/holidays/countries/eswatini.py b/holidays/countries/eswatini.py
index 72c9e4c29..0725e3074 100644
--- a/holidays/countries/eswatini.py
+++ b/holidays/countries/eswatini.py
@@ -12,11 +12,11 @@
 import warnings
 
 from holidays.calendars.gregorian import JAN, DEC
-from holidays.groups import ChristianHolidays, InternationalHolidays
+from holidays.groups import ChristianHolidays, InternationalHolidays, StaticHolidays
 from holidays.observed_holiday_base import ObservedHolidayBase, SUN_TO_NEXT_MON, SUN_TO_NEXT_TUE
 
 
-class Eswatini(ObservedHolidayBase, ChristianHolidays, InternationalHolidays):
+class Eswatini(ObservedHolidayBase, ChristianHolidays, InternationalHolidays, StaticHolidays):
     """
     https://swazilii.org/sz/legislation/act/1938/71
     https://www.officeholidays.com/countries/swaziland
@@ -24,15 +24,11 @@ class Eswatini(ObservedHolidayBase, ChristianHolidays, InternationalHolidays):
 
     country = "SZ"
     observed_label = "%s (Observed)"
-    special_holidays = {
-        # https://mg.co.za/article/1999-12-09-swaziland-declares-bank-holidays/
-        1999: (DEC, 31, "Y2K changeover"),
-        2000: (JAN, 3, "Y2K changeover"),
-    }
 
     def __init__(self, *args, **kwargs):
         ChristianHolidays.__init__(self)
         InternationalHolidays.__init__(self)
+        StaticHolidays.__init__(self, cls=EswatiniStaticHolidays)
         super().__init__(observed_rule=SUN_TO_NEXT_MON, observed_since=2021, *args, **kwargs)
 
     def _populate(self, year):
@@ -87,3 +83,11 @@ class SZ(Eswatini):
 
 class SZW(Eswatini):
     pass
+
+
+class EswatiniStaticHolidays:
+    special_holidays = {
+        # https://mg.co.za/article/1999-12-09-swaziland-declares-bank-holidays/
+        1999: (DEC, 31, "Y2K changeover"),
+        2000: (JAN, 3, "Y2K changeover"),
+    }
diff --git a/holidays/countries/indonesia.py b/holidays/countries/indonesia.py
index 147a6ced0..d99e2b0a8 100644
--- a/holidays/countries/indonesia.py
+++ b/holidays/countries/indonesia.py
@@ -24,6 +24,7 @@
     ChristianHolidays,
     InternationalHolidays,
     IslamicHolidays,
+    StaticHolidays,
 )
 from holidays.holiday_base import HolidayBase
 
@@ -35,6 +36,7 @@ class Indonesia(
     ChristianHolidays,
     InternationalHolidays,
     IslamicHolidays,
+    StaticHolidays,
 ):
     """
     References:
@@ -50,48 +52,13 @@ class Indonesia(
     supported_languages = ("en_US", "id", "uk")
     supported_categories = {GOVERNMENT, PUBLIC}
 
-    # Election Day.
-    election_day = tr("Hari Pemilihan")
-    # Eid al-Fitr Joint Holiday.
-    eid_al_fitr_joint_holiday = tr("Cuti Bersama Hari Raya Idulfitri")
-    # Christmas Joint Holiday.
-    christmas_joint_holiday = tr("Cuti Bersama Hari Raya Natal")
-    # Lunar New Year Joint Holiday.
-    lunar_new_year_joint_holiday = tr("Cuti Bersama Tahun Baru Imlek")
-    # Day of Silence Joint Holiday.
-    day_of_silence_joint_holiday = tr("Cuti Bersama Hari Suci Nyepi")
-
-    special_public_holidays = {
-        2018: (JUN, 27, election_day),
-        2019: (APR, 17, election_day),
-        2020: (DEC, 9, election_day),
-    }
-    special_government_holidays = {
-        2022: (
-            (APR, 29, eid_al_fitr_joint_holiday),
-            (MAY, 4, eid_al_fitr_joint_holiday),
-            (MAY, 5, eid_al_fitr_joint_holiday),
-            (MAY, 6, eid_al_fitr_joint_holiday),
-            (DEC, 26, christmas_joint_holiday),
-        ),
-        2023: (
-            (JAN, 23, lunar_new_year_joint_holiday),
-            (MAR, 23, day_of_silence_joint_holiday),
-            (APR, 19, eid_al_fitr_joint_holiday),
-            (APR, 20, eid_al_fitr_joint_holiday),
-            (APR, 21, eid_al_fitr_joint_holiday),
-            (APR, 24, eid_al_fitr_joint_holiday),
-            (APR, 25, eid_al_fitr_joint_holiday),
-            (DEC, 26, christmas_joint_holiday),
-        ),
-    }
-
     def __init__(self, *args, **kwargs):
         BuddhistCalendarHolidays.__init__(self, cls=IndonesiaBuddhistHolidays, show_estimated=True)
         ChineseCalendarHolidays.__init__(self, cls=IndonesiaChineseHolidays, show_estimated=True)
         ChristianHolidays.__init__(self)
         InternationalHolidays.__init__(self)
         IslamicHolidays.__init__(self, cls=IndonesiaIslamicHolidays)
+        StaticHolidays.__init__(self, cls=IndonesiaStaticHolidays)
         super().__init__(*args, **kwargs)
 
     def _populate_public_holidays(self):
@@ -380,3 +347,41 @@ class IndonesiaIslamicHolidays(_CustomIslamicHolidays):
         2021: (OCT, 19),
         2022: (OCT, 8),
     }
+
+
+class IndonesiaStaticHolidays:
+    # Election Day.
+    election_day = tr("Hari Pemilihan")
+    # Eid al-Fitr Joint Holiday.
+    eid_al_fitr_joint_holiday = tr("Cuti Bersama Hari Raya Idulfitri")
+    # Christmas Joint Holiday.
+    christmas_joint_holiday = tr("Cuti Bersama Hari Raya Natal")
+    # Lunar New Year Joint Holiday.
+    lunar_new_year_joint_holiday = tr("Cuti Bersama Tahun Baru Imlek")
+    # Day of Silence Joint Holiday.
+    day_of_silence_joint_holiday = tr("Cuti Bersama Hari Suci Nyepi")
+
+    special_public_holidays = {
+        2018: (JUN, 27, election_day),
+        2019: (APR, 17, election_day),
+        2020: (DEC, 9, election_day),
+    }
+    special_government_holidays = {
+        2022: (
+            (APR, 29, eid_al_fitr_joint_holiday),
+            (MAY, 4, eid_al_fitr_joint_holiday),
+            (MAY, 5, eid_al_fitr_joint_holiday),
+            (MAY, 6, eid_al_fitr_joint_holiday),
+            (DEC, 26, christmas_joint_holiday),
+        ),
+        2023: (
+            (JAN, 23, lunar_new_year_joint_holiday),
+            (MAR, 23, day_of_silence_joint_holiday),
+            (APR, 19, eid_al_fitr_joint_holiday),
+            (APR, 20, eid_al_fitr_joint_holiday),
+            (APR, 21, eid_al_fitr_joint_holiday),
+            (APR, 24, eid_al_fitr_joint_holiday),
+            (APR, 25, eid_al_fitr_joint_holiday),
+            (DEC, 26, christmas_joint_holiday),
+        ),
+    }
diff --git a/holidays/countries/japan.py b/holidays/countries/japan.py
index c70137919..1d9a019bb 100644
--- a/holidays/countries/japan.py
+++ b/holidays/countries/japan.py
@@ -16,12 +16,12 @@
 
 from holidays.calendars.gregorian import FEB, MAR, APR, MAY, JUN, JUL, AUG, SEP, OCT, NOV
 from holidays.constants import BANK, PUBLIC
-from holidays.groups import InternationalHolidays
+from holidays.groups import InternationalHolidays, StaticHolidays
 from holidays.helpers import _normalize_tuple
 from holidays.holiday_base import HolidayBase
 
 
-class Japan(HolidayBase, InternationalHolidays):
+class Japan(HolidayBase, InternationalHolidays, StaticHolidays):
     """
     References:
 
@@ -31,21 +31,12 @@ class Japan(HolidayBase, InternationalHolidays):
 
     country = "JP"
     default_language = "ja"
-    special_public_holidays = {
-        1959: (APR, 10, tr("結婚の儀")),  # The Crown Prince marriage ceremony.
-        1989: (FEB, 24, tr("大喪の礼")),  # State Funeral of Emperor Shōwa.
-        1990: (NOV, 12, tr("即位礼正殿の儀")),  # Enthronement ceremony.
-        1993: (JUN, 9, tr("結婚の儀")),  # The Crown Prince marriage ceremony.
-        2019: (
-            (MAY, 1, tr("天皇の即位の日")),  # Enthronement day.
-            (OCT, 22, tr("即位礼正殿の儀が行われる日")),  # Enthronement ceremony.
-        ),
-    }
     supported_categories = {BANK, PUBLIC}
     supported_languages = ("en_US", "ja")
 
     def __init__(self, *args, **kwargs) -> None:
         InternationalHolidays.__init__(self)
+        StaticHolidays.__init__(self, cls=JapanStaticHolidays)
         super().__init__(*args, **kwargs)
 
     def _populate_public_holidays(self):
@@ -240,3 +231,16 @@ class JP(Japan):
 
 class JPN(Japan):
     pass
+
+
+class JapanStaticHolidays:
+    special_public_holidays = {
+        1959: (APR, 10, tr("結婚の儀")),  # The Crown Prince marriage ceremony.
+        1989: (FEB, 24, tr("大喪の礼")),  # State Funeral of Emperor Shōwa.
+        1990: (NOV, 12, tr("即位礼正殿の儀")),  # Enthronement ceremony.
+        1993: (JUN, 9, tr("結婚の儀")),  # The Crown Prince marriage ceremony.
+        2019: (
+            (MAY, 1, tr("天皇の即位の日")),  # Enthronement day.
+            (OCT, 22, tr("即位礼正殿の儀が行われる日")),  # Enthronement ceremony.
+        ),
+    }
diff --git a/holidays/countries/kenya.py b/holidays/countries/kenya.py
index 02d455416..b9d52e6f8 100644
--- a/holidays/countries/kenya.py
+++ b/holidays/countries/kenya.py
@@ -10,11 +10,11 @@
 #  License: MIT (see LICENSE file)
 
 from holidays.calendars.gregorian import FEB, APR, AUG, SEP
-from holidays.groups import ChristianHolidays, InternationalHolidays
+from holidays.groups import ChristianHolidays, InternationalHolidays, StaticHolidays
 from holidays.observed_holiday_base import ObservedHolidayBase, SUN_TO_NEXT_MON, SUN_TO_NEXT_TUE
 
 
-class Kenya(ObservedHolidayBase, ChristianHolidays, InternationalHolidays):
+class Kenya(ObservedHolidayBase, ChristianHolidays, InternationalHolidays, StaticHolidays):
     """
     https://en.wikipedia.org/wiki/Public_holidays_in_Kenya
     http://kenyaembassyberlin.de/Public-Holidays-in-Kenya.48.0.html
@@ -23,21 +23,11 @@ class Kenya(ObservedHolidayBase, ChristianHolidays, InternationalHolidays):
 
     country = "KE"
     observed_label = "%s (Observed)"
-    special_holidays = {
-        2020: (FEB, 11, "President Moi Celebration of Life Day"),
-        2022: (
-            (APR, 29, "State Funeral for Former President Mwai Kibaki"),
-            (AUG, 9, "Election Day"),
-            (SEP, 10, "Day of Mourning for Queen Elizabeth II"),
-            (SEP, 11, "Day of Mourning for Queen Elizabeth II"),
-            (SEP, 12, "Day of Mourning for Queen Elizabeth II"),
-            (SEP, 13, "Inauguration Day"),
-        ),
-    }
 
     def __init__(self, *args, **kwargs):
         ChristianHolidays.__init__(self)
         InternationalHolidays.__init__(self)
+        StaticHolidays.__init__(self, cls=KenyaStaticHolidays)
         super().__init__(observed_rule=SUN_TO_NEXT_MON, *args, **kwargs)
 
     def _populate(self, year):
@@ -89,3 +79,17 @@ class KE(Kenya):
 
 class KEN(Kenya):
     pass
+
+
+class KenyaStaticHolidays:
+    special_holidays = {
+        2020: (FEB, 11, "President Moi Celebration of Life Day"),
+        2022: (
+            (APR, 29, "State Funeral for Former President Mwai Kibaki"),
+            (AUG, 9, "Election Day"),
+            (SEP, 10, "Day of Mourning for Queen Elizabeth II"),
+            (SEP, 11, "Day of Mourning for Queen Elizabeth II"),
+            (SEP, 12, "Day of Mourning for Queen Elizabeth II"),
+            (SEP, 13, "Inauguration Day"),
+        ),
+    }
diff --git a/holidays/countries/laos.py b/holidays/countries/laos.py
index 4b4225cf6..8e588e23b 100644
--- a/holidays/countries/laos.py
+++ b/holidays/countries/laos.py
@@ -14,7 +14,7 @@
 from holidays.calendars.gregorian import JAN, MAR, APR, MAY, JUL, OCT, DEC
 from holidays.calendars.thai import KHMER_CALENDAR
 from holidays.constants import BANK, PUBLIC, SCHOOL, WORKDAY
-from holidays.groups import InternationalHolidays, ThaiCalendarHolidays
+from holidays.groups import InternationalHolidays, ThaiCalendarHolidays, StaticHolidays
 from holidays.observed_holiday_base import (
     ObservedHolidayBase,
     THU_FRI_TO_NEXT_MON,
@@ -25,7 +25,7 @@
 )
 
 
-class Laos(ObservedHolidayBase, InternationalHolidays, ThaiCalendarHolidays):
+class Laos(ObservedHolidayBase, InternationalHolidays, StaticHolidays, ThaiCalendarHolidays):
     """
     A subclass of :py:class:`HolidayBase` representing public holidays in Laos.
 
@@ -68,77 +68,12 @@ class Laos(ObservedHolidayBase, InternationalHolidays, ThaiCalendarHolidays):
     default_language = "lo"
     # %s (in lieu).
     observed_label = tr("ພັກຊົດເຊີຍ%s")
-
-    # Special Cases.
-
-    # Special Bank Holiday.
-    special_bank_day_off = tr("ມື້ປິດການໃຫ້ບໍລິການຂອງທະນາຄານຕົວແທນ")
-
-    # New Year's Day (in lieu).
-    new_year_day_in_lieu = tr("ພັກຊົດເຊີຍວັນປີໃໝ່ສາກົນ")
-
-    # Internation Women's Rights Day (in lieu).
-    international_womens_rights_day_in_lieu = tr("ພັກຊົດເຊີຍວັນແມ່ຍິງສາກົນ")
-
-    # Lao New Year's Day (in lieu).
-    lao_new_year_in_lieu = tr("ພັກຊົດເຊີຍບຸນປີໃໝ່ລາວ")
-
-    # Lao New Year's Day (Special).
-    lao_new_year_special = tr("ພັກບຸນປີໃໝ່ລາວ")
-
-    # Labor Day (in lieu).
-    labor_day_in_lieu = tr("ພັກຊົດເຊີຍວັນກຳມະກອນສາກົນ")
-
-    # Establishment Day of the Lao Women's Union (in lieu).
-    lao_womens_union_in_lieu = tr("ພັກຊົດເຊີຍວັນສ້າງຕັ້ງສະຫະພັນແມ່ຍິງລາວ")
-
-    # Establishment Day of the BOL (in lieu).
-    establishment_day_of_bol_in_lieu = tr("ພັກຊົດເຊີຍວັນສ້າງຕັ້ງທະນາຄານແຫ່ງ ສປປ ລາວ")
-
-    # Lao National Day (in lieu).
-    lao_national_day_in_lieu = tr("ພັກຊົດເຊີຍວັນຊາດ")
-
-    special_bank_holidays = {
-        2015: (JAN, 2, special_bank_day_off),
-        2017: (OCT, 9, establishment_day_of_bol_in_lieu),
-    }
-    special_public_holidays = {
-        2011: (APR, 13, lao_new_year_in_lieu),
-        2012: (
-            (JAN, 2, new_year_day_in_lieu),
-            (APR, 13, lao_new_year_in_lieu),
-            (APR, 17, lao_new_year_in_lieu),
-            (DEC, 3, lao_national_day_in_lieu),
-        ),
-        2013: (APR, 17, lao_new_year_in_lieu),
-        2015: (
-            (MAR, 9, international_womens_rights_day_in_lieu),
-            (APR, 17, lao_new_year_special),
-        ),
-        2016: (
-            (APR, 13, lao_new_year_special),
-            (APR, 18, lao_new_year_special),
-            (MAY, 2, labor_day_in_lieu),
-        ),
-        2017: (
-            (JAN, 2, new_year_day_in_lieu),
-            (APR, 13, lao_new_year_in_lieu),
-            (APR, 17, lao_new_year_in_lieu),
-            (DEC, 4, lao_national_day_in_lieu),
-        ),
-        2020: (
-            (APR, 13, lao_new_year_special),
-            (APR, 17, lao_new_year_special),
-        ),
-    }
-    special_workday_holidays = {
-        2019: (JUL, 22, lao_womens_union_in_lieu),
-    }
     supported_languages = ("en_US", "lo", "th")
 
     def __init__(self, *args, **kwargs):
         InternationalHolidays.__init__(self)
         ThaiCalendarHolidays.__init__(self, KHMER_CALENDAR)
+        StaticHolidays.__init__(self, cls=LaosStaticHolidays)
         super().__init__(observed_rule=SAT_SUN_TO_NEXT_MON, observed_since=2018, *args, **kwargs)
 
     def _populate_bank_holidays(self):
@@ -447,3 +382,71 @@ class LA(Laos):
 
 class LAO(Laos):
     pass
+
+
+class LaosStaticHolidays:
+    # Special Cases.
+
+    # Special Bank Holiday.
+    special_bank_day_off = tr("ມື້ປິດການໃຫ້ບໍລິການຂອງທະນາຄານຕົວແທນ")
+
+    # New Year's Day (in lieu).
+    new_year_day_in_lieu = tr("ພັກຊົດເຊີຍວັນປີໃໝ່ສາກົນ")
+
+    # Internation Women's Rights Day (in lieu).
+    international_womens_rights_day_in_lieu = tr("ພັກຊົດເຊີຍວັນແມ່ຍິງສາກົນ")
+
+    # Lao New Year's Day (in lieu).
+    lao_new_year_in_lieu = tr("ພັກຊົດເຊີຍບຸນປີໃໝ່ລາວ")
+
+    # Lao New Year's Day (Special).
+    lao_new_year_special = tr("ພັກບຸນປີໃໝ່ລາວ")
+
+    # Labor Day (in lieu).
+    labor_day_in_lieu = tr("ພັກຊົດເຊີຍວັນກຳມະກອນສາກົນ")
+
+    # Establishment Day of the Lao Women's Union (in lieu).
+    lao_womens_union_in_lieu = tr("ພັກຊົດເຊີຍວັນສ້າງຕັ້ງສະຫະພັນແມ່ຍິງລາວ")
+
+    # Establishment Day of the BOL (in lieu).
+    establishment_day_of_bol_in_lieu = tr("ພັກຊົດເຊີຍວັນສ້າງຕັ້ງທະນາຄານແຫ່ງ ສປປ ລາວ")
+
+    # Lao National Day (in lieu).
+    lao_national_day_in_lieu = tr("ພັກຊົດເຊີຍວັນຊາດ")
+
+    special_bank_holidays = {
+        2015: (JAN, 2, special_bank_day_off),
+        2017: (OCT, 9, establishment_day_of_bol_in_lieu),
+    }
+    special_public_holidays = {
+        2011: (APR, 13, lao_new_year_in_lieu),
+        2012: (
+            (JAN, 2, new_year_day_in_lieu),
+            (APR, 13, lao_new_year_in_lieu),
+            (APR, 17, lao_new_year_in_lieu),
+            (DEC, 3, lao_national_day_in_lieu),
+        ),
+        2013: (APR, 17, lao_new_year_in_lieu),
+        2015: (
+            (MAR, 9, international_womens_rights_day_in_lieu),
+            (APR, 17, lao_new_year_special),
+        ),
+        2016: (
+            (APR, 13, lao_new_year_special),
+            (APR, 18, lao_new_year_special),
+            (MAY, 2, labor_day_in_lieu),
+        ),
+        2017: (
+            (JAN, 2, new_year_day_in_lieu),
+            (APR, 13, lao_new_year_in_lieu),
+            (APR, 17, lao_new_year_in_lieu),
+            (DEC, 4, lao_national_day_in_lieu),
+        ),
+        2020: (
+            (APR, 13, lao_new_year_special),
+            (APR, 17, lao_new_year_special),
+        ),
+    }
+    special_workday_holidays = {
+        2019: (JUL, 22, lao_womens_union_in_lieu),
+    }
diff --git a/holidays/countries/slovakia.py b/holidays/countries/slovakia.py
index fb9abc5db..30be81360 100644
--- a/holidays/countries/slovakia.py
+++ b/holidays/countries/slovakia.py
@@ -13,11 +13,11 @@
 
 from holidays.calendars.gregorian import OCT
 from holidays.constants import PUBLIC, WORKDAY
-from holidays.groups import ChristianHolidays, InternationalHolidays
+from holidays.groups import ChristianHolidays, InternationalHolidays, StaticHolidays
 from holidays.holiday_base import HolidayBase
 
 
-class Slovakia(HolidayBase, ChristianHolidays, InternationalHolidays):
+class Slovakia(HolidayBase, ChristianHolidays, InternationalHolidays, StaticHolidays):
     """
     https://en.wikipedia.org/wiki/Public_holidays_in_Slovakia
     https://sk.wikipedia.org/wiki/Zoznam_sviatkov_na_Slovensku
@@ -26,17 +26,13 @@ class Slovakia(HolidayBase, ChristianHolidays, InternationalHolidays):
 
     country = "SK"
     default_language = "sk"
-    special_public_holidays = {
-        # 100th anniversary of the adoption of the Declaration
-        # of the Slovak Nation.
-        2018: (OCT, 30, tr("100. výročie prijatia Deklarácie slovenského národa"))
-    }
     supported_categories = {PUBLIC, WORKDAY}
     supported_languages = ("en_US", "sk", "uk")
 
     def __init__(self, *args, **kwargs):
         ChristianHolidays.__init__(self)
         InternationalHolidays.__init__(self)
+        StaticHolidays.__init__(self, cls=SlovakiaStaticHolidays)
         super().__init__(*args, **kwargs)
 
     def _populate_public_holidays(self):
@@ -107,3 +103,11 @@ class SK(Slovakia):
 
 class SVK(Slovakia):
     pass
+
+
+class SlovakiaStaticHolidays:
+    special_public_holidays = {
+        # 100th anniversary of the adoption of the Declaration
+        # of the Slovak Nation.
+        2018: (OCT, 30, tr("100. výročie prijatia Deklarácie slovenského národa"))
+    }
diff --git a/holidays/countries/south_korea.py b/holidays/countries/south_korea.py
index dedb227db..68c63d8a7 100644
--- a/holidays/countries/south_korea.py
+++ b/holidays/countries/south_korea.py
@@ -17,46 +17,46 @@
 from holidays.calendars import _CustomChineseHolidays
 from holidays.calendars.gregorian import JAN, FEB, MAR, APR, MAY, JUN, AUG, SEP, SAT, SUN
 from holidays.constants import BANK, PUBLIC
-from holidays.groups import ChineseCalendarHolidays, ChristianHolidays, InternationalHolidays
+from holidays.groups import (
+    ChineseCalendarHolidays,
+    ChristianHolidays,
+    InternationalHolidays,
+    StaticHolidays,
+)
 from holidays.holiday_base import HolidayBase
 
 
-class SouthKorea(HolidayBase, ChineseCalendarHolidays, ChristianHolidays, InternationalHolidays):
+class SouthKorea(
+    HolidayBase,
+    ChineseCalendarHolidays,
+    ChristianHolidays,
+    InternationalHolidays,
+    StaticHolidays,
+):
     """
+    References:
     1. https://publicholidays.co.kr/ko/2020-dates/
     2. https://en.wikipedia.org/wiki/Public_holidays_in_South_Korea
-    3. https://www.law.go.kr/%EB%B2%95%EB%A0%B9/%EA%B4%80%EA%B3%B5%EC%84%9C%EC%9D%98%20%EA%B3%B5%ED%9C%B4%EC%9D%BC%EC%97%90%20%EA%B4%80%ED%95%9C%20%EA%B7%9C%EC%A0%95  # noqa
+    3. https://www.law.go.kr/법령/관공서의%20공휴일에%20관한%20규정
 
     According to (3), the alt holidays in Korea are as follows:
-    The alt holiday means next first non holiday after the holiday.
-    Independence movement day, Liberation day, National Foundation Day,
-    Hangul Day, Children's Day, Birthday of the Buddha, Christmas Day have alt holiday if they fell on Saturday or Sunday.
-    Lunar New Year's Day, Korean Mid Autumn Day have alt holiday if they fell
-    on only sunday.
+    - The alt holiday means next first non holiday after the holiday.
+    - Independence Movement Day, Liberation Day, National Foundation Day,
+      Hangul Day, Children's Day, Birthday of the Buddha, Christmas Day have
+      alt holiday if they fell on Saturday or Sunday.
+    - Lunar New Year's Day, Korean Mid Autumn Day have alt holiday if they
+      fell on Sunday.
 
     """
 
     country = "KR"
     supported_categories = {BANK, PUBLIC}
-    special_public_holidays = {
-        2016: (APR, 13, "National Assembly Election Day"),
-        2017: (MAY, 9, "Presidential Election Day"),
-        2018: (JUN, 13, "Local Election Day"),
-        2020: (
-            (APR, 15, "National Assembly Election Day"),
-            # Since 2020.08.15 is Sat, the government decided to make 2020.08.17 holiday.
-            (AUG, 17, "Alternative public holiday"),
-        ),
-        2022: (
-            (MAR, 9, "Presidential Election Day"),
-            (JUN, 1, "Local Election Day"),
-        ),
-    }
 
     def __init__(self, *args, **kwargs):
         ChineseCalendarHolidays.__init__(self, cls=SouthKoreaLunisolarHolidays)
         ChristianHolidays.__init__(self)
         InternationalHolidays.__init__(self)
+        StaticHolidays.__init__(self, cls=SouthKoreaStaticHolidays)
         super().__init__(*args, **kwargs)
 
     def _add_alt_holiday(
@@ -206,3 +206,20 @@ class SouthKoreaLunisolarHolidays(_CustomChineseHolidays):
         1942: (SEP, 25),
         2040: (SEP, 21),
     }
+
+
+class SouthKoreaStaticHolidays:
+    special_public_holidays = {
+        2016: (APR, 13, "National Assembly Election Day"),
+        2017: (MAY, 9, "Presidential Election Day"),
+        2018: (JUN, 13, "Local Election Day"),
+        2020: (
+            (APR, 15, "National Assembly Election Day"),
+            # Since 2020.08.15 is Sat, the government decided to make 2020.08.17 holiday.
+            (AUG, 17, "Alternative public holiday"),
+        ),
+        2022: (
+            (MAR, 9, "Presidential Election Day"),
+            (JUN, 1, "Local Election Day"),
+        ),
+    }
diff --git a/holidays/countries/uruguay.py b/holidays/countries/uruguay.py
index 22e84e5a1..10e312407 100644
--- a/holidays/countries/uruguay.py
+++ b/holidays/countries/uruguay.py
@@ -15,7 +15,7 @@
 
 from holidays.calendars.gregorian import MAR
 from holidays.constants import BANK, PUBLIC
-from holidays.groups import ChristianHolidays, InternationalHolidays
+from holidays.groups import ChristianHolidays, InternationalHolidays, StaticHolidays
 from holidays.observed_holiday_base import (
     ObservedHolidayBase,
     TUE_WED_TO_PREV_MON,
@@ -23,7 +23,7 @@
 )
 
 
-class Uruguay(ObservedHolidayBase, ChristianHolidays, InternationalHolidays):
+class Uruguay(ObservedHolidayBase, ChristianHolidays, InternationalHolidays, StaticHolidays):
     """
     References:
     - https://en.wikipedia.org/wiki/Public_holidays_in_Uruguay
@@ -40,22 +40,10 @@ class Uruguay(ObservedHolidayBase, ChristianHolidays, InternationalHolidays):
     supported_categories = {BANK, PUBLIC}
     supported_languages = ("en_US", "es", "uk")
 
-    # Presidential Inauguration Day.
-    presidential_inauguration_day = tr("Inauguración del Presidente de la República")
-    special_public_holidays = {
-        1985: (MAR, 1, presidential_inauguration_day),
-        1990: (MAR, 1, presidential_inauguration_day),
-        1995: (MAR, 1, presidential_inauguration_day),
-        2000: (MAR, 1, presidential_inauguration_day),
-        2005: (MAR, 1, presidential_inauguration_day),
-        2010: (MAR, 1, presidential_inauguration_day),
-        2015: (MAR, 1, presidential_inauguration_day),
-        2020: (MAR, 1, presidential_inauguration_day),
-    }
-
     def __init__(self, *args, **kwargs):
         ChristianHolidays.__init__(self)
         InternationalHolidays.__init__(self)
+        StaticHolidays.__init__(self, cls=UruguayStaticHolidays)
         # Decree Law #14977, # 15535, #16805.
         super().__init__(observed_rule=TUE_WED_TO_PREV_MON + THU_FRI_TO_NEXT_MON, *args, **kwargs)
 
@@ -172,3 +160,18 @@ class UY(Uruguay):
 
 class URY(Uruguay):
     pass
+
+
+class UruguayStaticHolidays:
+    # Presidential Inauguration Day.
+    presidential_inauguration_day = tr("Inauguración del Presidente de la República")
+    special_public_holidays = {
+        1985: (MAR, 1, presidential_inauguration_day),
+        1990: (MAR, 1, presidential_inauguration_day),
+        1995: (MAR, 1, presidential_inauguration_day),
+        2000: (MAR, 1, presidential_inauguration_day),
+        2005: (MAR, 1, presidential_inauguration_day),
+        2010: (MAR, 1, presidential_inauguration_day),
+        2015: (MAR, 1, presidential_inauguration_day),
+        2020: (MAR, 1, presidential_inauguration_day),
+    }