diff --git a/src/holidata/holidays/SG.py b/src/holidata/holidays/SG.py
new file mode 100644
index 0000000..29cfc73
--- /dev/null
+++ b/src/holidata/holidays/SG.py
@@ -0,0 +1,223 @@
+from datetime import date, timedelta
+from dateutil.easter import EASTER_WESTERN
+from holidata.utils import SmartDayArrow
+from .holidays import Country
+
+class SG(Country):
+    id = "SG"
+    languages = ["en"]
+    default_lang = "en"
+    regions = []
+    easter_type = EASTER_WESTERN
+
+    def __init__(self):
+        super().__init__()
+
+        self.define_holiday() \
+            .with_name("New Year's Day") \
+            .on(self.new_years_day) \
+            .with_flags("NF")
+
+        self.define_holiday() \
+            .with_name("Chinese New Year") \
+            .on(self.chinese_new_year) \
+            .with_flags("NRV")
+
+        self.define_holiday() \
+            .with_name("Chinese New Year (Second Day)") \
+            .on(self.chinese_new_year_day2) \
+            .with_flags("NRV")
+
+        self.define_holiday() \
+            .with_name("Good Friday") \
+            .on("2 days before Easter") \
+            .with_flags("NRV")
+        
+        self.define_holiday() \
+            .with_name("Labour Day") \
+            .on(self.labour_day) \
+            .with_flags("NF")
+
+        self.define_holiday() \
+            .with_name("Hari Raya Puasa") \
+            .on(self.hari_raya_puasa) \
+            .with_flags("NRV")
+
+        self.define_holiday() \
+            .with_name("Vesak Day") \
+            .on(self.vesak_day) \
+            .with_flags("NRV")
+
+        self.define_holiday() \
+            .with_name("Hari Raya Haji") \
+            .on(self.hari_raya_haji) \
+            .with_flags("NRV")
+
+        self.define_holiday() \
+            .with_name("National Day") \
+            .on(self.national_day) \
+            .with_flags("NF")
+
+        self.define_holiday() \
+            .with_name("Deepavali") \
+            .on(self.deepavali) \
+            .with_flags("NRV")
+
+        self.define_holiday() \
+            .with_name("Christmas Day") \
+            .on(self.christmas_day) \
+            .with_flags("NRF")
+
+    @staticmethod
+    def shift_to_monday_if_weekend(holiday_date):
+        """Shift the holiday to Monday if it falls on a Saturday or Sunday."""
+        smart_date = SmartDayArrow.fromdate(holiday_date)
+        return smart_date.shift_to_weekday("monday", including=True).date()
+
+    @staticmethod
+    def new_years_day(year):
+        """Return the date of New Year's Day for the given year."""
+        return SG.shift_to_monday_if_weekend(date(year, 1, 1))
+
+    @staticmethod
+    def chinese_new_year(year):
+        """Return the date of Chinese New Year for the given year."""
+        dates = {
+            2011: date(2011, 2, 3),
+            2012: date(2012, 1, 23),
+            2013: date(2013, 2, 10),
+            2014: date(2014, 1, 31),
+            2015: date(2015, 2, 19),
+            2016: date(2016, 2, 8),
+            2017: date(2017, 1, 28),
+            2018: date(2018, 2, 16),
+            2019: date(2019, 2, 5),
+            2020: date(2020, 1, 25),
+            2021: date(2021, 2, 12),
+            2022: date(2022, 2, 1),
+            2023: date(2023, 1, 22),
+            2024: date(2024, 2, 10),
+            2025: date(2025, 1, 29),
+            2026: date(2026, 2, 17)
+        }
+        return dates.get(year)
+
+    @staticmethod
+    def chinese_new_year_day2(year):
+        """Return the date of the second day of Chinese New Year."""
+        first_day = SG.chinese_new_year(year)
+        return SG.shift_to_monday_if_weekend(first_day + timedelta(days=1)) if first_day else None
+
+    @staticmethod
+    def labour_day(year):
+        """Return the date of Labour Day for the given year."""
+        return SG.shift_to_monday_if_weekend(date(year, 5, 1))
+
+    @staticmethod
+    def hari_raya_puasa(year):
+        """Return the date of Hari Raya Puasa for the given year."""
+        dates = {
+            2011: date(2011, 8, 30),
+            2012: date(2012, 8, 19),
+            2013: date(2013, 8, 8),
+            2014: date(2014, 7, 28),
+            2015: date(2015, 7, 17),
+            2016: date(2016, 7, 6),
+            2017: date(2017, 6, 25),
+            2018: date(2018, 6, 15),
+            2019: date(2019, 6, 5),
+            2020: date(2020, 5, 24),
+            2021: date(2021, 5, 13),
+            2022: date(2022, 5, 3),
+            2023: date(2023, 4, 22),
+            2024: date(2024, 4, 10),
+            2025: date(2025, 3, 31),
+            2026: date(2026, 3, 20)
+        }
+        holiday_date = dates.get(year)
+        if holiday_date and holiday_date.weekday() == 5:  # Saturday
+            return holiday_date + timedelta(days=2)  # Move to Monday
+        return holiday_date
+
+    @staticmethod
+    def vesak_day(year):
+        """Return the date of Vesak Day for the given year."""
+        dates = {
+            2011: date(2011, 5, 17),
+            2012: date(2012, 5, 5),
+            2013: date(2013, 5, 24),
+            2014: date(2014, 5, 13),
+            2015: date(2015, 6, 1),
+            2016: date(2016, 5, 21),
+            2017: date(2017, 5, 10),
+            2018: date(2018, 5, 29),
+            2019: date(2019, 5, 19),
+            2020: date(2020, 5, 7),
+            2021: date(2021, 5, 26),
+            2022: date(2022, 5, 15),
+            2023: date(2023, 6, 2),
+            2024: date(2024, 5, 22),
+            2025: date(2025, 5, 12),
+            2026: date(2026, 5, 31)
+        }
+        return dates.get(year)
+
+    @staticmethod
+    def hari_raya_haji(year):
+        """Return the date of Hari Raya Haji for the given year."""
+        dates = {
+            2011: date(2011, 11, 6),
+            2012: date(2012, 10, 26),
+            2013: date(2013, 10, 15),
+            2014: date(2014, 10, 5),
+            2015: date(2015, 9, 24),
+            2016: date(2016, 9, 12),
+            2017: date(2017, 9, 1),
+            2018: date(2018, 8, 22),
+            2019: date(2019, 8, 11),
+            2020: date(2020, 7, 31),
+            2021: date(2021, 7, 20),
+            2022: date(2022, 7, 10),
+            2023: date(2023, 6, 29),
+            2024: date(2024, 6, 17),
+            2025: date(2025, 6, 7),
+            2026: date(2026, 5, 27)
+        }
+        return dates.get(year)
+
+    @staticmethod
+    def national_day(year):
+        """Return the date of National Day for the given year."""
+        return SG.shift_to_monday_if_weekend(date(year, 8, 9))
+
+    @staticmethod
+    def deepavali(year):
+        """Return the date of Deepavali for the given year."""
+        dates = {
+            2011: date(2011, 10, 26),
+            2012: date(2012, 11, 13),
+            2013: date(2013, 11, 3),
+            2014: date(2014, 10, 22),
+            2015: date(2015, 11, 10),
+            2016: date(2016, 10, 29),
+            2017: date(2017, 10, 18),
+            2018: date(2018, 11, 6),
+            2019: date(2019, 10, 27),
+            2020: date(2020, 11, 14),
+            2021: date(2021, 11, 4),
+            2022: date(2022, 10, 24),
+            2023: date(2023, 11, 12),
+            2024: date(2024, 10, 31),
+            2025: date(2025, 10, 20),
+            2026: date(2026, 11, 9)
+        }
+        return SG.shift_to_monday_if_weekend(dates.get(year))
+
+    @staticmethod
+    def christmas_day(year):
+        """Return the date of Christmas Day for the given year."""
+        return SG.shift_to_monday_if_weekend(date(year, 12, 25))
+
+    # Legal sources:
+    # https://www.mom.gov.sg/employment-practices/public-holidays
+    # https://www.mom.gov.sg/employment-practices/public-holidays-entitlement-and-pay
\ No newline at end of file
diff --git a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2011] 1.py b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2011] 1.py
index 3479d00..cccec12 100644
--- a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2011] 1.py	
+++ b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2011] 1.py	
@@ -135,14 +135,6 @@
         'region': 'SL',
         'type': 'RV'
     },
-    {
-        'date': '2011-08-15',
-        'description': 'Mariä Himmelfahrt',
-        'locale': 'de-DE',
-        'notes': 'In Gemeinden mit überwiegend katholischer Bevölkerung',
-        'region': 'BY',
-        'type': 'RF'
-    },
     {
         'date': '2011-08-15',
         'description': 'Mariä Himmelfahrt',
diff --git a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2012] 1.py b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2012] 1.py
index d358ffc..40ebd42 100644
--- a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2012] 1.py	
+++ b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2012] 1.py	
@@ -135,14 +135,6 @@
         'region': 'SL',
         'type': 'RV'
     },
-    {
-        'date': '2012-08-15',
-        'description': 'Mariä Himmelfahrt',
-        'locale': 'de-DE',
-        'notes': 'In Gemeinden mit überwiegend katholischer Bevölkerung',
-        'region': 'BY',
-        'type': 'RF'
-    },
     {
         'date': '2012-08-15',
         'description': 'Mariä Himmelfahrt',
diff --git a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2013] 1.py b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2013] 1.py
index c43ca88..b7a4867 100644
--- a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2013] 1.py	
+++ b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2013] 1.py	
@@ -135,14 +135,6 @@
         'region': 'SL',
         'type': 'RV'
     },
-    {
-        'date': '2013-08-15',
-        'description': 'Mariä Himmelfahrt',
-        'locale': 'de-DE',
-        'notes': 'In Gemeinden mit überwiegend katholischer Bevölkerung',
-        'region': 'BY',
-        'type': 'RF'
-    },
     {
         'date': '2013-08-15',
         'description': 'Mariä Himmelfahrt',
diff --git a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2014] 1.py b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2014] 1.py
index b0cbfd2..fbad120 100644
--- a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2014] 1.py	
+++ b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2014] 1.py	
@@ -135,14 +135,6 @@
         'region': 'SL',
         'type': 'RV'
     },
-    {
-        'date': '2014-08-15',
-        'description': 'Mariä Himmelfahrt',
-        'locale': 'de-DE',
-        'notes': 'In Gemeinden mit überwiegend katholischer Bevölkerung',
-        'region': 'BY',
-        'type': 'RF'
-    },
     {
         'date': '2014-08-15',
         'description': 'Mariä Himmelfahrt',
diff --git a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2015] 1.py b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2015] 1.py
index a869670..e1a0785 100644
--- a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2015] 1.py	
+++ b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2015] 1.py	
@@ -135,14 +135,6 @@
         'region': 'SL',
         'type': 'RV'
     },
-    {
-        'date': '2015-08-15',
-        'description': 'Mariä Himmelfahrt',
-        'locale': 'de-DE',
-        'notes': 'In Gemeinden mit überwiegend katholischer Bevölkerung',
-        'region': 'BY',
-        'type': 'RF'
-    },
     {
         'date': '2015-08-15',
         'description': 'Mariä Himmelfahrt',
diff --git a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2016] 1.py b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2016] 1.py
index 43f9480..2d2a992 100644
--- a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2016] 1.py	
+++ b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2016] 1.py	
@@ -135,14 +135,6 @@
         'region': 'SL',
         'type': 'RV'
     },
-    {
-        'date': '2016-08-15',
-        'description': 'Mariä Himmelfahrt',
-        'locale': 'de-DE',
-        'notes': 'In Gemeinden mit überwiegend katholischer Bevölkerung',
-        'region': 'BY',
-        'type': 'RF'
-    },
     {
         'date': '2016-08-15',
         'description': 'Mariä Himmelfahrt',
diff --git a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2017] 1.py b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2017] 1.py
index 4589cdf..1783491 100644
--- a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2017] 1.py	
+++ b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2017] 1.py	
@@ -135,14 +135,6 @@
         'region': 'SL',
         'type': 'RV'
     },
-    {
-        'date': '2017-08-15',
-        'description': 'Mariä Himmelfahrt',
-        'locale': 'de-DE',
-        'notes': 'In Gemeinden mit überwiegend katholischer Bevölkerung',
-        'region': 'BY',
-        'type': 'RF'
-    },
     {
         'date': '2017-08-15',
         'description': 'Mariä Himmelfahrt',
diff --git a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2018] 1.py b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2018] 1.py
index f7400d0..7bbadf8 100644
--- a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2018] 1.py	
+++ b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2018] 1.py	
@@ -135,14 +135,6 @@
         'region': 'SL',
         'type': 'RV'
     },
-    {
-        'date': '2018-08-15',
-        'description': 'Mariä Himmelfahrt',
-        'locale': 'de-DE',
-        'notes': 'In Gemeinden mit überwiegend katholischer Bevölkerung',
-        'region': 'BY',
-        'type': 'RF'
-    },
     {
         'date': '2018-08-15',
         'description': 'Mariä Himmelfahrt',
diff --git a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2019] 1.py b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2019] 1.py
index 5c17d4d..1c05334 100644
--- a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2019] 1.py	
+++ b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2019] 1.py	
@@ -143,14 +143,6 @@
         'region': 'SL',
         'type': 'RV'
     },
-    {
-        'date': '2019-08-15',
-        'description': 'Mariä Himmelfahrt',
-        'locale': 'de-DE',
-        'notes': 'In Gemeinden mit überwiegend katholischer Bevölkerung',
-        'region': 'BY',
-        'type': 'RF'
-    },
     {
         'date': '2019-08-15',
         'description': 'Mariä Himmelfahrt',
diff --git a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2020] 1.py b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2020] 1.py
index 1f7f8f5..5c99880 100644
--- a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2020] 1.py	
+++ b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2020] 1.py	
@@ -151,14 +151,6 @@
         'region': 'SL',
         'type': 'RV'
     },
-    {
-        'date': '2020-08-15',
-        'description': 'Mariä Himmelfahrt',
-        'locale': 'de-DE',
-        'notes': 'In Gemeinden mit überwiegend katholischer Bevölkerung',
-        'region': 'BY',
-        'type': 'RF'
-    },
     {
         'date': '2020-08-15',
         'description': 'Mariä Himmelfahrt',
diff --git a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2021] 1.py b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2021] 1.py
index b341779..2aff7e7 100644
--- a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2021] 1.py	
+++ b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2021] 1.py	
@@ -143,14 +143,6 @@
         'region': 'SL',
         'type': 'RV'
     },
-    {
-        'date': '2021-08-15',
-        'description': 'Mariä Himmelfahrt',
-        'locale': 'de-DE',
-        'notes': 'In Gemeinden mit überwiegend katholischer Bevölkerung',
-        'region': 'BY',
-        'type': 'RF'
-    },
     {
         'date': '2021-08-15',
         'description': 'Mariä Himmelfahrt',
diff --git a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2022] 1.py b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2022] 1.py
index b4352e3..019cf2e 100644
--- a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2022] 1.py	
+++ b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2022] 1.py	
@@ -143,14 +143,6 @@
         'region': 'SL',
         'type': 'RV'
     },
-    {
-        'date': '2022-08-15',
-        'description': 'Mariä Himmelfahrt',
-        'locale': 'de-DE',
-        'notes': 'In Gemeinden mit überwiegend katholischer Bevölkerung',
-        'region': 'BY',
-        'type': 'RF'
-    },
     {
         'date': '2022-08-15',
         'description': 'Mariä Himmelfahrt',
diff --git a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2023] 1.py b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2023] 1.py
index 0ab1db7..190cd48 100644
--- a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2023] 1.py	
+++ b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2023] 1.py	
@@ -143,14 +143,6 @@
         'region': 'SL',
         'type': 'RV'
     },
-    {
-        'date': '2023-08-15',
-        'description': 'Mariä Himmelfahrt',
-        'locale': 'de-DE',
-        'notes': 'In Gemeinden mit überwiegend katholischer Bevölkerung',
-        'region': 'BY',
-        'type': 'RF'
-    },
     {
         'date': '2023-08-15',
         'description': 'Mariä Himmelfahrt',
diff --git a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2024] 1.py b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2024] 1.py
index 37236db..d641edd 100644
--- a/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2024] 1.py	
+++ b/tests/snapshots/snap_test_holidata/test_holidata_produces_holidays_for_locale_and_year[de-DE-2024] 1.py	
@@ -143,14 +143,6 @@
         'region': 'SL',
         'type': 'RV'
     },
-    {
-        'date': '2024-08-15',
-        'description': 'Mariä Himmelfahrt',
-        'locale': 'de-DE',
-        'notes': 'In Gemeinden mit überwiegend katholischer Bevölkerung',
-        'region': 'BY',
-        'type': 'RF'
-    },
     {
         'date': '2024-08-15',
         'description': 'Mariä Himmelfahrt',