Here is the manual from GAP customer service.

Dear gap.com Customer,
Thank you for your email regarding the Sporty Printed Watch user
instructions. Please accept our apologies that no directions were
received with your order.
The instructions are as follows:
Button Functions:
A. Light
B. Mode
C. Start
D. Reset
Standard Time Adjustment:
1. To set the time, press the Mode button three times (The seconds and
the word Tuesday should start flashing).
2. If the seconds position shows less than 30 seconds, pressing the
Start button will reset the seconds to 00. If the seconds position shows
more than 30 seconds, pressing the Start button will reset the seconds
to 00 and the minutes will increase by 1.
3. Press the Reset button until the area you want to change starts
flashing (i.e., second, minute, hour, day, month, and weekend. Press
Start button once for per unit increment, press and hold for 3 seconds
for speedy advance.
4. At completion, press Mode button to resume standard time display.
To reset the Alarm:
Press the B: Mode button until you reach the alarm.
Press the D: Restart button.
Press the C: Restart button to get back to the time

The instructions already posted are great for setting the time or alarm, but they wouldn't help me turn the alarm OFF. To turn it off, press and hold the RESET button (alarm time will display) and simultaneously press START. The small ALM indicator in the upper-right (just under the day of the week indicator) will turn off and a short beep may sound. Pressing the START button a second time while continuing to hold RESET will toggle the alarm back on.

Here is how to fix the 12/24 hour problem:

- Use 'mode' button to cycle to where you reset the time
- "HOLD" the reset button continuously while you use the "start" b utton to adjust the time.
- After the military time cycles through hour 24 and starts over at 1, you will see an "AM" icon appear on the right side at about 10oclock. If you continue to change the hour to 12, it will go to 1 again and a "PM" will show up on the right side.
- If you continue past twelve a 2nd time, the watch will recycle back to military time.

hope this helps

Got the answer. press the mode button three times the "tue" should be blinking, use the reset button to move thru the date, time, etc. then use the start button to move the time

Try pressing and holding the reset button. the display should start blinking and the other buttons, mode i think, will move you around the display so you can set it, the same way you set the time.

In addition to the official notice above I found-
Pressing mode once, first and two last days flash - timer feature using start and reset is now available.
Pressing mode twice, monday flashes - alarm time set using reset to move from hours and minutes, and advancing using the start button. You can set 0 hours, and 0 min to have no alarm.
Pressing mode 3 times, to set time per above instructions.

Thank you for your email regarding the GapKids watch. The instructions
are as follows:

Button Functions:

A. Light
B. Mode
C. Start
D. Reset

Standard Time Adjustment:

1. To set the time, press the Mode button three times (The seconds and
the word Tuesday should start flashing).

2. If the seconds position shows less than 30 seconds, pressing the
Start button will reset the seconds to 00. If the seconds position shows
more than 30 seconds, pressing the Start button will reset the seconds
to 00 and the minutes will increase by 1.

3. Press the Reset button until the area you want to change starts
flashing (i.e., second, minute, hour, day, month, and weekend. Press
Start button once for per unit increment, press and hold for 3 seconds
for speedy advance.

4. At completion, press Mode button to resume standard time display.

To reset the Alarm:

Press the B: Mode button until you reach the alarm.
Press the D: Restart button.
Press the C: Restart button to get back to the time.

Also, we're sorry to hear of the problems you're experiencing with your
daughter's dress. To best assist you with your concerns, please call
1-800-GAP-STYLE, and follow the prompts to share your store experience.
We are available Monday through Friday from 9:00 a.m. to 9:00 p.m. and
Saturday, 11 a.m. to 9 p.m. Please note, all hours are indicated in
Eastern Time.

Thanks again for writing.

Sincerely,

Shelly
Customer Service Consultant

I cant save the date when i finished adjusting the time i cant save its still blinking. what can i do?

How to adjust time etc in casio digitial wall clock with buttons
rest ,mode,up,down,c/f buzz
v.pichai

Got the alram figured out now.
But any idea on how to switch from 24-hr mode to 12-hr? These watches are for kids and they do not get the 24-hr mode.

Thanks,