The time format for my yoho app is not there. Cannot change it the time format to 12 hours.

Question edited for clarity and toss in some CAPS.

Military Time is 24 hour Time, 00:00 to 23:99! It sounds like actually want 12 hour time, 12 hours of A.M. and 12 hours of P.M.

You just ask :>D

Say "Change to 24-Hour clock" or use the Alexa app.

1. Open the Alexa app .
2. Select Devices .
3. Go to Echo & Alexa, or to All Devices.
4. Select your Echo Dot with clock device. This opens device settings.
5. Under General, select LED Display.
6. Turn 24-Hour Clock on or off.

Change the Time Format on Your Echo Dot with clock

..

To change the clock format, visit the General section of Momentum's Settings ??, scroll down to the Clock Format option and then click 12 hour or 24 hour to the right of it. When you switch to the 12-hour format, the AM/PM unit will display for a moment and then fade away to keep the interface clean.
https://get.momentumdash.help/hc/en-us/articles/360022896993-How-can-I-change-the-clock-format-12-hour-24-hour-

https://www.youtube.com/watch?v=VfthmmTM7Oo

Customer helpline phone number is +1 8OO 648 162O ,,,...

In mobile u can go to setting>date and time> there is is boxx showing time format uncheck the box to 12 hour format
Thanks...

just change your time format settings from 24-hour format to 12-hour format.

To set the hour format, press S1 button
to toggle between 12-hour and 24-hour
format. The P.M. indicator may be
displayed to indicate the time period
12:00 A.M. - 11:59 P.M. in 12-hour
format.
11.To set the calendar format, press S1
button to toggle between M-D (monthdate)
and D-M (date-month) format.
12.After finished making all the settings,
press S2 button to confirm...

Try this:-

First set the watch to 24 hour format rather than 12 hour format.

To change your Armitron WR165 watch from military time (also known as 24-hour time) to 12-hour time, you will need to follow these steps:

1. Press and hold the "mode" button until the display shows the current time format (either 12H or 24H).
2. Press the "set" button to toggle between the two time formats.
3. When the desired time format is displayed, press the "mode" button to exit the setting mode and save the new time format.

If you are having trouble changing the time format on your watch, you may want to consult the user manual for your specific model, as the steps may vary slightly depending on the version of the watch you have. You can also try contacting Armitron customer support for further assistance.

Try this:
To set time and date:
1) With time and date showing, press SET.
2) Seconds ?ash. Press START/STOP to round time to nearest minute,
setting seconds to zero.
3) Press MODE. Hour ?ashes. Press START/STOP to change hour,
including AM (no symbol) and PM.
4) Press MODE. Minutes ?ash. Press START/STOP to change minutes;
hold button to scan values.
5) Press MODE. Month ?ashes. Press START/STOP to change month.
6) Press MODE. Date ?ashes. Press START/STOP to change date.
7) Press MODE. Day ?ashes. Press START/STOP to change day.
8) Press MODE. Time format ?ashes. Press START/STOP to select
12- or 24-hour time format. 12-hour format has AM/PM.
9) Press SET, at any step, to exit and save settings.
Date (day of month) appears in upper part of display in Time mode.
Press and hold START/STOP to see month and date in large digits.

NOTE: 12/24 HOUR TIME IS SELECTED BY PRESSING RESET/LIGHT ONLY WHEN THE HOURS MARKER IS 
FLASHING. THE “A” OR “P” WILL DISAPPEAR WHEN THE 
WATCH IS SET TO 24-HOUR TIME.