bpo-20281, bpo-29964: update datetime docs to refer %z and %Z to a pre-existing footnote (GH-30354)

(cherry picked from commit 305588c67c)

Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>
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Miss Islington (bot) 2022-01-14 15:59:56 -08:00 committed by GitHub
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@ -434,10 +434,10 @@ Functions
| | negative time difference from UTC/GMT of the | |
| | form +HHMM or -HHMM, where H represents decimal| |
| | hour digits and M represents decimal minute | |
| | digits [-23:59, +23:59]. | |
| | digits [-23:59, +23:59]. [1]_ | |
+-----------+------------------------------------------------+-------+
| ``%Z`` | Time zone name (no characters if no time zone | |
| | exists). | |
| | exists). Deprecated. [1]_ | |
+-----------+------------------------------------------------+-------+
| ``%%`` | A literal ``'%'`` character. | |
+-----------+------------------------------------------------+-------+
@ -458,7 +458,7 @@ Functions
calculations when the day of the week and the year are specified.
Here is an example, a format for dates compatible with that specified in the
:rfc:`2822` Internet email standard. [#]_ ::
:rfc:`2822` Internet email standard. [1]_ ::
>>> from time import gmtime, strftime
>>> strftime("%a, %d %b %Y %H:%M:%S +0000", gmtime())
@ -879,10 +879,9 @@ Timezone Constants
.. rubric:: Footnotes
.. [#] The use of ``%Z`` is now deprecated, but the ``%z`` escape that expands to the
preferred hour/minute offset is not supported by all ANSI C libraries. Also, a
.. [1] The use of ``%Z`` is now deprecated, but the ``%z`` escape that expands to the
preferred hour/minute offset is not supported by all ANSI C libraries. Also, a
strict reading of the original 1982 :rfc:`822` standard calls for a two-digit
year (%y rather than %Y), but practice moved to 4-digit years long before the
year (``%y`` rather than ``%Y``), but practice moved to 4-digit years long before the
year 2000. After that, :rfc:`822` became obsolete and the 4-digit year has
been first recommended by :rfc:`1123` and then mandated by :rfc:`2822`.