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It decodes the system strftime's result using TZNAME_ENCODING which is
also used to decode timezone names. This may be correct for timezone
names themselves (I don't know), but the strftime result is encoded in
the LC_TIME encoding - at least on my Linux system.

As C99 section 7.23.3.5 states:
"Each conversion specifier is replaced by appropriate characters as
described in the following list. The appropriate characters are
determined using the LC_TIME category of the current locale and by the
values of zero or more members of the broken-down time structure pointed
to by timeptr, as specified in brackets in the description."

Is it possible to find out what specific encoding is being used?
In most cases, nl_langinfo(CODESET) would be the right choice, but that
depends on the LC_CTYPE category. If available, wcsftime should be used.
In any case, I think issue5903 and issue5562 are related. We should
close some of them as duplicates.

Here is a patch that resolves this issue for systems supporting
wcsftime, which should be the majority of systems on which the problem
can occur.

The patch looks good. (Can this be tested?)

It's difficult to test. The only test I can think of is one that gets
skipped if the fr_FR (say) locale is not configured. The test would then
try to find out what the name of February is, which should return a
string (see issue5562).

Can you use test_support.run_with_locale?

Benjamin Peterson wrote:
> Benjamin Peterson <benjamin@python.org> added the comment:
> 
> Can you use test_support.run_with_locale?
I don't think so. IIUC, run_with_locale will fallback to not
setting the locale if none of the listed locales actually works
on the system. This would be undesirable for this issue - it
would be a proper test only if you have a locale for which
strftime currently fails (i.e. returns non-ASCII characters,
and doesn't use UTF-8).

2009年5月29日 Martin v. Löwis <report@bugs.python.org>:
>
> Martin v. Löwis <martin@v.loewis.de> added the comment:
>
> Benjamin Peterson wrote:
>> Benjamin Peterson <benjamin@python.org> added the comment:
>>
>> Can you use test_support.run_with_locale?
>
> I don't think so. IIUC, run_with_locale will fallback to not
> setting the locale if none of the listed locales actually works
> on the system. This would be undesirable for this issue - it
> would be a proper test only if you have a locale for which
> strftime currently fails (i.e. returns non-ASCII characters,
> and doesn't use UTF-8).
Well, I think you should just apply the patch then.

Committed as r73043, r73044 

I came onto this ticket via #5562, does anyone know of a similar ticket/bugfix for Python 2.6?