How to reset clock on oster microwave OGG21401?

Press and hold the timer button for 3 or 4 secs. The display will change to clock mode. now key in the correct time for example if you want to set it as 8 30. select 0,8,3,0 in sequence . Now you will see the time as 0830 in the display. now press the timer button once. The clock is reset.

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Else easy way is at 1:00 clock in the afternoon remove the microwave plug and put it back again :) it will default to 1:00