How can I get rid of am/pm once and forever, and have a 24-hour time?

[Constantine]

Hello!

How can I get rid of am/pm once and forever, and have a 24-hour time?
I have an en-GB locale and koi8-r character set (to be able to see 
Russian characters in my console).
What do I need to do, to have am/pm disappear and to have 24-hour time 
in all system utilities?
For instance, the 'uptime' command still shows am/pm.

%tail -n 6 /etc/csh.login /etc/profile
==> /etc/csh.login <==
setenv LANG en_GB.ISO8859-1
setenv MM_CHARSET KOI8-R
#
setenv LC_ALL en_GB.ISO8859-1
setenv LC_COLLATE ru_RU.KOI8-R
setenv LC_CTYPE ru_RU.KOI8-R

==> /etc/profile <==
LANG=en_GB.ISO8859-1; export LANG
MM_CHARSET=KOI8-R; export MM_CHARSET
#
LC_ALL=en_GB.ISO8859-1; export LC_ALL
LC_COLLATE=ru_RU.KOI8-R; export LC_COLLATE
LC_CTYPE=ru_RU.KOI8-R; export LC_CTYPE
%date
Mon 11 Aug 2003 16:42:18 EDT
%uptime
 4:42pm  up  1:12, 1 user, load averages: 0.10, 0.03, 0.01
%

Cheers,
Constantine.