Manual:$wgLocalTZoffset

Details
Note: Before 1.7.0 this parameter was in hours.

This will change the time for MediaWiki, e.g. the time when an article was changed. During daylight saving time you need to add 60 Minutes to this parameter.

Examples: $wgLocaltimezone = 'CET'; $wgLocalTZoffset = +60;

Note: Changing this parameter during runtime may result in server crash (apache on windows).