[3.11] gh-111187: Postpone removal version for locale.getdefaultlocale() to 3.15 (GH-111188) (#111326)

Doc/library/locale.rst

@@ -303,7 +303,7 @@ The :mod:`locale` module defines the following exception and functions:
    *language code* and *encoding* may be ``None`` if their values cannot be
    determined.
 
-   .. deprecated-removed:: 3.11 3.13
+   .. deprecated-removed:: 3.11 3.15
 
 
 .. function:: getlocale(category=LC_CTYPE)

Doc/whatsnew/3.11.rst

@@ -1798,7 +1798,7 @@ Standard Library
   * :func:`importlib.resources.path`
 
 * The :func:`locale.getdefaultlocale` function is deprecated and will be
-  removed in Python 3.13. Use :func:`locale.setlocale`,
+  removed in Python 3.15. Use :func:`locale.setlocale`,
   :func:`locale.getpreferredencoding(False) <locale.getpreferredencoding>` and
   :func:`locale.getlocale` functions instead.
   (Contributed by Victor Stinner in :gh:`90817`.)

Lib/locale.py

@@ -556,10 +556,11 @@ def getdefaultlocale(envvars=('LC_ALL', 'LC_CTYPE', 'LANG', 'LANGUAGE')):
     """
 
     import warnings
-    warnings.warn(
-        "Use setlocale(), getencoding() and getlocale() instead",
-        DeprecationWarning, stacklevel=2
-    )
+    warnings._deprecated(
+        "locale.getdefaultlocale",
+        "{name!r} is deprecated and slated for removal in Python {remove}. "
+        "Use setlocale(), getencoding() and getlocale() instead.",
+        remove=(3, 15))
 
     try:
         # check if it's supported by the _locale module

Misc/NEWS.d/next/Library/2023-10-22-21-28-05.gh-issue-111187._W11Ab.rst

@@ -0,0 +1 @@
+Postpone removal version for locale.getdefaultlocale() to Python 3.15.