datetime: various parameters can now safely be passed as keyword arguments on 3.12+ (#9415)

stdlib/datetime.pyi

@@ -70,7 +70,14 @@ class date:
     @property
     def day(self) -> int: ...
     def ctime(self) -> str: ...
-    def strftime(self, __format: str) -> str: ...
+    # On <3.12, the name of the parameter in the pure-Python implementation
+    # didn't match the name in the C implementation,
+    # meaning it is only *safe* to pass it as a keyword argument on 3.12+
+    if sys.version_info >= (3, 12):
+        def strftime(self, format: str) -> str: ...
+    else:
+        def strftime(self, __format: str) -> str: ...
+
     def __format__(self, __fmt: str) -> str: ...
     def isoformat(self) -> str: ...
     def timetuple(self) -> struct_time: ...
@@ -140,7 +147,14 @@ class time:
     def isoformat(self, timespec: str = ...) -> str: ...
     @classmethod
     def fromisoformat(cls: type[Self], __time_string: str) -> Self: ...
-    def strftime(self, __format: str) -> str: ...
+    # On <3.12, the name of the parameter in the pure-Python implementation
+    # didn't match the name in the C implementation,
+    # meaning it is only *safe* to pass it as a keyword argument on 3.12+
+    if sys.version_info >= (3, 12):
+        def strftime(self, format: str) -> str: ...
+    else:
+        def strftime(self, __format: str) -> str: ...
+
     def __format__(self, __fmt: str) -> str: ...
     def utcoffset(self) -> timedelta | None: ...
     def tzname(self) -> str | None: ...
@@ -233,11 +247,16 @@ class datetime(date):
     def tzinfo(self) -> _TzInfo | None: ...
     @property
     def fold(self) -> int: ...
-    # The first parameter in `fromtimestamp` is actually positional-or-keyword,
-    # but it is named "timestamp" in the C implementation and "t" in the Python implementation,
-    # so it is only truly *safe* to pass it as a positional argument.
-    @classmethod
-    def fromtimestamp(cls: type[Self], __timestamp: float, tz: _TzInfo | None = ...) -> Self: ...
+    # On <3.12, the name of the first parameter in the pure-Python implementation
+    # didn't match the name in the C implementation,
+    # meaning it is only *safe* to pass it as a keyword argument on 3.12+
+    if sys.version_info >= (3, 12):
+        @classmethod
+        def fromtimestamp(cls: type[Self], timestamp: float, tz: _TzInfo | None = ...) -> Self: ...
+    else:
+        @classmethod
+        def fromtimestamp(cls: type[Self], __timestamp: float, tz: _TzInfo | None = ...) -> Self: ...
+
     @classmethod
     def utcfromtimestamp(cls: type[Self], __t: float) -> Self: ...
     if sys.version_info >= (3, 8):