First wake the watch by tapping either side button. With the time display active, you can enter time-setting mode by holding down both side buttons for about two seconds. If using the watch for the first time, or after swapping batteries, it may wake in time-setting mode automatically.
Date and time are set by cycling through each digit. The currently-active digit is shown with a blinking underline cursor. Tap the left button to advance to the next digit, or tap the right button to increment the current digit (it will “roll over” to 0 or 1 as needed).
There are two digits each for the year, month, day, hour and minute, and the watch will briefly display the symbols Y, M, D, etc. when moving from one pair of digits to the next. The high and low digits are set individually…this is different from most digital clocks, we find it faster and less troublesome. The range for each digit varies, and the watch will keep the values in check.
There is no seconds adjustment. Seconds will be reset to zero when exiting time-setting mode.
The last “digit” is a 12- or 24-hour display mode selection. 12/24 currently only affects the marquee mode; the binary display is limited to 12-hour time. Advancing past the 12/24 item will scroll back to the first digit of the year. So if you overshoot a digit you wanted to set, just repeatedly tap the left button until you roll around to it again.
To exit time-setting mode and return to the last time display mode, hold down both buttons for two seconds again.