To switch between 12 hour and military time, while watch is in regular model (not settings mode), just tap the top-left button once. When the tiny am/pm dis.. To change your Armitron watch from military time, simply press and hold the "A" button for 2 seconds until the time display starts flashing. Then, press the "B" button to switch between 12-hour and 24-hour time formats.
Learn how to switch from military time on an Armitron All Sport Watch.. You can set the time on an Armitron Pro Sport to a 12-hour clock or 24-hour clock, called military time in the United States. The watch sets to 12-hour-time by default. To switch to a 24-hour time display: Hold the "Reset" button (A) until you hear a beep. Press the "ST/STP" button (D). The "AM" or "PM" icon to the left of the time will go away.