A dual time zone watch can show you time simultaneously in two zones. This can be done with two hour and minute displays on one dial. Or, watches can have a standard 12-hour dial with an additional hour hand that tracks 24-hour time or military time (with 24 hour indicators on the
bezel of the watch). A GMT watch lets you monitor your home time in a 12 hour scale and separately adjust a 24-hour hand to a second time zone (handy when traveling).