Wikimedia Bugzilla is closed!

Currently the only way to change time zone description to local language, is by
changing the code itself. 
for ex:
 $d = $wgContLang->timeanddate( date( 'YmdHis' ), false, false) .
      ' (' . date( 'T' ) . ')';
 if ( isset( $wgLocaltimezone ) ) {
    putenv( 'TZ='.$oldtz );
 }

to:

 $d = $wgContLang->timeanddate( date( 'YmdHis' ), false, false) .
      ' (some local timezone)';
 if ( isset( $wgLocaltimezone ) ) {
    putenv( 'TZ='.$oldtz );
 }

which, we must redoing this for each mediawiki upgrades.

Please provide $wg variable for this for customization through localsettings.php
Thanks