Hi Tinay
I found this on page 10 of the manual:
"MY SETTINGS
Your new microwave oven can be customized to suit your
personal preferences. Simply press the My Settings
button to configure the following options
No. 3 - Clock display control 1=12HR 2=24HR"
Link to manual page 10 -->
Samsung SMH1713 User Manual Turning On The Power For The First
Trust this helps, regards Alan
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