Hyundai Sonata LF Owner's Manual page 255

With Audio system
Whenever the battery terminals or
related fuses are disconnected, you
must reset the time.
To set the time :
The ignition switch must be in the
ACC position or the ON position.
• H (Hour)
Press the "H" button to advance the
time displayed by one hour.
• M (Minute)
Press the "M" button to advance the
time displayed by one minute.
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• Display conversion
To change the 12 hour format to the
24 hour format, press the "H" and
"M" button simultaneously for more
than 4 seconds.
For example, if the "H" and "M" but-
ton is pressed when the time is 10:15
p.m., the display will change to 22:15
With AVN system (if equipped)
You can set the clock by using the
Audio or Navigation.
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