I just tested switching to Auckland time and UTC +12 and updated the Security Log. Looks good to me.
UTC +12: UTC time is 2015-06-29 02:09:04 Local time is 2015-06-29 14:09:04
Auckland time: UTC time is 2015-06-29 02:10:03 Local time is 2015-06-29 14:10:03
Manual update of the Security Log file actual LMTime: June 29 2015 14:10:30