=== modified file 'Doc/library/datetime.rst'
--- Doc/library/datetime.rst	2009-01-29 00:54:32 +0000
+++ Doc/library/datetime.rst	2009-03-29 02:53:23 +0000
@@ -1630,7 +1630,10 @@
 
 (3)
    The range really is ``0`` to ``61``; this accounts for leap seconds and the
-   (very rare) double leap seconds.
+   (very rare) double leap seconds.  The :mod:`time` module may produce and does
+   accept leap seconds since it is based on the Posix standard, but the
+   :mod:`datetime` module does not accept leap second in :func:`strptime`
+   input nor will it produce them in :func:`strftime` output.
 
 (4)
    When used with the :func:`strptime` function, ``%U`` and ``%W`` are only used in