diff --git a/stubs/pytz/pytz/__init__.pyi b/stubs/pytz/pytz/__init__.pyi
index 7ea6856ce..e934a3d15 100644
--- a/stubs/pytz/pytz/__init__.pyi
+++ b/stubs/pytz/pytz/__init__.pyi
@@ -13,8 +13,8 @@ from .tzinfo import BaseTzInfo as BaseTzInfo, DstTzInfo, StaticTzInfo
 
 # Actually named UTC and then masked with a singleton with the same name
 class _UTCclass(BaseTzInfo):
-    def localize(self, dt: datetime.datetime, is_dst: bool | None = ...) -> datetime.datetime: ...
-    def normalize(self, dt: datetime.datetime) -> datetime.datetime: ...
+    def localize(self, dt: datetime.datetime, is_dst: bool | None = False) -> datetime.datetime: ...
+    def normalize(self, dt: datetime.datetime, is_dst: bool | None = False) -> datetime.datetime: ...
     def tzname(self, dt: datetime.datetime | None) -> str: ...
     def utcoffset(self, dt: datetime.datetime | None) -> datetime.timedelta: ...
     def dst(self, dt: datetime.datetime | None) -> datetime.timedelta: ...
@@ -30,8 +30,8 @@ class _FixedOffset(datetime.tzinfo):
     def utcoffset(self, dt: Unused) -> datetime.timedelta | None: ...
     def dst(self, dt: Unused) -> datetime.timedelta: ...
     def tzname(self, dt: Unused) -> None: ...
-    def localize(self, dt: datetime.datetime, is_dst: bool = False) -> datetime.datetime: ...
-    def normalize(self, dt: datetime.datetime, is_dst: bool = False) -> datetime.datetime: ...
+    def localize(self, dt: datetime.datetime, is_dst: bool | None = False) -> datetime.datetime: ...
+    def normalize(self, dt: datetime.datetime, is_dst: bool | None = False) -> datetime.datetime: ...
 
 def FixedOffset(offset: int, _tzinfos: dict[int, _FixedOffset] = {}) -> _UTCclass | _FixedOffset: ...
 
diff --git a/stubs/pytz/pytz/tzinfo.pyi b/stubs/pytz/pytz/tzinfo.pyi
index b1d0386bc..784c0a91d 100644
--- a/stubs/pytz/pytz/tzinfo.pyi
+++ b/stubs/pytz/pytz/tzinfo.pyi
@@ -9,7 +9,7 @@ class BaseTzInfo(datetime.tzinfo):
     # The following abstract methods don't exist in the implementation, but
     # are implemented by all sub-classes.
     @abstractmethod
-    def localize(self, dt: datetime.datetime) -> datetime.datetime: ...
+    def localize(self, dt: datetime.datetime, is_dst: bool | None = ...) -> datetime.datetime: ...
     @abstractmethod
     def normalize(self, dt: datetime.datetime) -> datetime.datetime: ...
     @abstractmethod