I was on a trip with my little sister this week in her 2006 Jeep Grand Cherokee that has a navigation system in it. The clock was an hour ahead so I offered to figure out how to set the clock to the proper time. I was a little confused when I looked into the settings of the clock via the navigation system menu it seemed as though it should be pulling the time from GPS. So I decided to make the clock correct I would switch the displayed clock to user input and adjust it from the time being provided by the GPS system. Below are directions on how to change the time and set to user input.