Add missing third party modules (#8321)

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
Co-authored-by: hauntsaninja <>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

stubs/tzlocal/tzlocal/utils.pyi

@@ -0,0 +1,15 @@
+import sys
+
+import pytz
+
+if sys.version_info >= (3, 9):
+    import zoneinfo
+
+    class ZoneInfoNotFoundError(pytz.UnknownTimeZoneError, zoneinfo.ZoneInfoNotFoundError): ...
+
+else:
+    class ZoneInfoNotFoundError(pytz.UnknownTimeZoneError): ...
+
+def get_system_offset(): ...
+def get_tz_offset(tz): ...
+def assert_tz_offset(tz) -> None: ...

stubs/tzlocal/tzlocal/windows_tz.pyi

@@ -0,0 +1,3 @@
+win_tz: dict[str, str]
+tz_names: dict[str, str]
+tz_win: dict[str, str]