Lifescan OneTouch Ultra Owner's Booklet page 47

STEP 2 Set the Minutes.
Press and release the C button to advance
one minute. To move faster, hold the C
button down. With the correct minute on
the display, press the M button and the
AM/PM (12-hour) format setting will start
flashing.
STEP 3 Set the Time Format.
The meter can display the time in either an
AM/PM (12-hour) format or a 24:00
(24-hour) format. The AM/PM format is
preset in the meter. If you wish to display
the time in the 24:00 format, press the C
button. With the preferred time format on
the display, press the M button and the
year setting will start flashing.
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