ls produces random output

[Andrew D Jewell]

My apologies for what must be a stupid question.

When I use 'ls -l' the date field sometimes appears in this form :
Dec 30  2004
and sometimes in this form :
Dec 30 08:49

ls seems to choose randomly, and will choose differently for each run.

What am I missing, and how do I get it to always use the second form above?

Many thanks for any help,
adj

P.S.

>  ls --version
ls (coreutils) 5.0
Written by Richard Stallman and David MacKenzie.

>  uname -a
Linux 2.4.26-v2tcp #1 SMP Thu Jul 1 18:24:13 PDT 2004 i686 i686 i386 GNU/Linux