Pentax Optio H90 Quick Manual page 15

Press the four-way controller (5) to select [24h], then use
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the four-way controller (23) to select [24h] (24-hour display)
or [12h] (12-hour display).
Press the four-way controller (5), then press the four-way
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controller (3) to move the frame to [Date].
Press the four-way controller (5) to select [01] (month),
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[01] (day) or [2010] (year), then use the four-way controller (23)
to set the date to the current day.
13 Press the four-way controller (5), then press the four-way
controller (3) to move the frame to [Time].
Set the time in the same manner as in
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Press the four-way controller (3)
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to select [Settings complete]
and press the 4 button.
.
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Date Adjustment
Date Format mm/dd/yy
Date 01/01/2010
Time 00:00
Settings complete
Cancel
MENU
24h
OK
OK
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