Issue #2568: Removed bogus rationale for supporting tm_sec=61.
diff --git a/Doc/library/time.rst b/Doc/library/time.rst
index dc6402c..28e994c 100644
--- a/Doc/library/time.rst
+++ b/Doc/library/time.rst
@@ -308,7 +308,7 @@
    | ``%y``    | Year without century as a decimal number       |       |
    |           | [00,99].                                       |       |
    +-----------+------------------------------------------------+-------+
-   | ``%Y``    | Year with century as a decimal number.         |       |
+   | ``%Y``    | Year with century as a decimal number.         | \(4)  |
    |           |                                                |       |
    +-----------+------------------------------------------------+-------+
    | ``%Z``    | Time zone name (no characters if no time zone  |       |
@@ -324,13 +324,20 @@
       the output hour field if the ``%I`` directive is used to parse the hour.
 
    (2)
-      The range really is ``0`` to ``61``; this accounts for leap seconds and the
-      (very rare) double leap seconds.
+      The range really is ``0`` to ``61``; value ``60`` is valid in
+      timestamps representing leap seconds and value ``61`` is supported
+      for historical reasons.
 
    (3)
       When used with the :func:`strptime` function, ``%U`` and ``%W`` are only used in
       calculations when the day of the week and the year are specified.
 
+   (4)
+      Produces different results depending on the value of
+      ``time.accept2dyear`` variable.  See :ref:`Year 2000 (Y2K)
+      issues <time-y2kissues>` for details.
+
+
    Here is an example, a format for dates compatible with that specified  in the
    :rfc:`2822` Internet email standard.  [#]_ ::