I'm attempting to set the date and time on my Admin page to display in my local time (GMT).

I've amended the admin/includes/languages/english.php to this:

// look in your $PATH_LOCALE/locale directory for available locales..
// on RedHat6.0 I used 'en_US'
// on FreeBSD 4.0 I use 'en_US.ISO_8859-1'
// this may not work under win32 environments..
setlocale(LC_TIME, 'en_GB.ISO_8859-1');
define('DATE_FORMAT_SHORT', '%d/%m/%Y'); // this is used for strftime()
define('DATE_FORMAT_LONG', '%A %d %B, %Y'); // this is used for strftime()
define('DATE_FORMAT', 'd/m/Y'); // this is used for date()
define('PHP_DATE_TIME_FORMAT', 'd/m/Y H:i:s'); // this is used for date()
define('DATE_TIME_FORMAT', DATE_FORMAT_SHORT . ' %H:%M:%S');
define('DATE_FORMAT_SPIFFYCAL', 'dd/MM/yyyy'); //Use only 'dd', 'MM' and 'yyyy' here in any order

which sets the display of date/month in the UK format in my Admin lists, but it doesn't alter the time displayed (it shows as GMT - 6 hours). Is there something up with my syntax, or am I altering the wrong thing?

Thanks in anticipation.

Phil