diff --git a/Doc/library/datetime.rst b/Doc/library/datetime.rst
index 64510a77c67c11..7a5f8ae2c95d90 100644
--- a/Doc/library/datetime.rst
+++ b/Doc/library/datetime.rst
@@ -2761,6 +2761,14 @@ Notes:
       :exc:`DeprecationWarning`. In 3.15 or later we may change this into
       an error or change the default year to a leap year. See :gh:`70647`.
 
+(11)
+   When parsing a string using :meth:`~.datetime.strptime`, if more than one
+   directives of the same time unit were used, only the last directive gets parsed
+   and applied to the datetime object. For example, if the format string contains
+   both ``%Y`` and ``%y``, like ``%Y%y``, only the last directive on the string (``%y``)
+   gets used on the resulting datetime object.
+
+
 .. rubric:: Footnotes
 
 .. [#] If, that is, we ignore the effects of Relativity