Take battery out and unplug to force a reset. Hold Display until it starts flashing 12 hr ----use tuning buttons if you need to change that to 24hr Tap Display to confirm setting and move to next stage Repeat the same steps of tap Display and then use tuning to adjust up or down for the hour and minutes.
Make sure to increase hour setting enough to have the "pm" show up for times after noon when using 12 hr format
Answers & Comments
Take battery out and unplug to force a reset.
Hold Display until it starts flashing 12 hr
----use tuning buttons if you need to change that to 24hr
Tap Display to confirm setting and move to next stage
Repeat the same steps of tap Display and then use tuning to adjust up or down for the hour and minutes.
Make sure to increase hour setting enough to have the "pm" show up for times after noon when using 12 hr format