Jeep GRAND CHEROKEE 2021 Owner's Manual page 177

Clock
When the Clock button is pressed on the touchscreen, the system displays the different options related to the vehicle's internal clock.
Setting Name
Sync Time With GPS
Set Time And Format/Time Format
Set Time Hours
Set Time Minutes
Show Time in Status Bar
Set Date
Description
This setting will sync the time to the GPS receiver in the system. The
system will control the time via the GPS location.
This setting will allow you set the time format (AM/PM). Sync Time With
GPS must be off for this setting to be available. The "12 hrs" setting will
set the time to a 12-hour format. The "24 hrs" setting will set the time to
a 24-hour format.
This setting will allow you to set the hours. Sync Time With GPS must be
off for this setting to be available. The "+" setting will increase the hours.
The "-" setting will decrease the hours.
This setting will allow you to set the minutes. Sync Time With GPS must
be off for this setting to be available. The "+" setting will increase the
minutes. The "-" setting will decrease the minutes.
This setting will place the time in the radio's status bar.
This setting will allow you to set the date.
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