test_output_textcalendar (in test_calendar.py) fails if the environment 
variable LANG is set to a non-english locale.

Python 3.0rc1 on MacOSX 10.5.5

$ LANG=de_DE.UTF-8 ./python.exe -E -bb ./Lib/test/regrtest.py -l 
test_calendar
test_calendar
test test_calendar failed -- errors occurred; run in verbose mode for 
details
1 test failed:
    test_calendar
$ LANG=en_US.UTF-8 ./python.exe -E -bb ./Lib/test/regrtest.py -l 
test_calendar
test_calendar
1 test OK.

It would be a lot of work to fix this as the month names are hardcoded in English in test_calendar.py

This passes for me on linux (2.7), which is what I would expect, since the locale should not actually affect a python program unless locale.setlocale is called, which regrtest doesn't do.

I also tried OSX 2.7+, and the 10.4 system python (2.6.1).  test_calendar passed using the specified command line in all cases.

Can anyone reproduce this issue?

As mentioned in #4045, I believe this is a problem with the user's local Python setup and not a Python bug.

Did you test it Python *3.0*? Apparently, the issue does not happen in Python 2.x, and also not in Python 3.1.2.

Apparently it was introduced somewhere in Python 3.0, and later fixed. 

I retested the issue in Python 3.0.1 on Mac OS X 10.6.4, using a freshly unpacked tarball, built with

./configure && make

and it still happens. To avoid influences of the user environment, I repeated the test in a newly created test account. Same issue.

The issue doesn't happen in Python 2.6, 2.6.5, 2.7, or 3.1.2, however.