#1436346: make it more obvious that timetuple[7] is yday.

Doc/library/datetime.rst

@@ -455,7 +455,9 @@ Instance methods:
    Return a :class:`time.struct_time` such as returned by :func:`time.localtime`.
    The hours, minutes and seconds are 0, and the DST flag is -1. ``d.timetuple()``
    is equivalent to ``time.struct_time((d.year, d.month, d.day, 0, 0, 0,
-   d.weekday(), d.toordinal() - date(d.year, 1, 1).toordinal() + 1, -1))``
+   d.weekday(), yday, -1))``, where ``yday = d.toordinal() - date(d.year, 1,
+   1).toordinal() + 1`` is the day number within the current year starting with
+   ``1`` for January 1st.
 
 
 .. method:: date.toordinal()
@@ -920,12 +922,13 @@ Instance methods:
 
    Return a :class:`time.struct_time` such as returned by :func:`time.localtime`.
    ``d.timetuple()`` is equivalent to ``time.struct_time((d.year, d.month, d.day,
-   d.hour, d.minute, d.second, d.weekday(), d.toordinal() - date(d.year, 1,
-   1).toordinal() + 1, dst))`` The :attr:`tm_isdst` flag of the result is set
-   according to the :meth:`dst` method:  :attr:`tzinfo` is ``None`` or :meth:`dst`
-   returns ``None``, :attr:`tm_isdst` is set to  ``-1``; else if :meth:`dst`
-   returns a non-zero value, :attr:`tm_isdst` is set to ``1``; else ``tm_isdst`` is
-   set to ``0``.
+   d.hour, d.minute, d.second, d.weekday(), yday, dst))``, where ``yday =
+   d.toordinal() - date(d.year, 1, 1).toordinal() + 1`` is the day number within
+   the current year starting with ``1`` for January 1st. The :attr:`tm_isdst` flag
+   of the result is set according to the :meth:`dst` method: :attr:`tzinfo` is
+   ``None`` or :meth:`dst`` returns ``None``, :attr:`tm_isdst` is set to ``-1``;
+   else if :meth:`dst` returns a non-zero value, :attr:`tm_isdst` is set to ``1``;
+   else ``tm_isdst`` is set to ``0``.
 
 
 .. method:: datetime.utctimetuple()