I have a '13 Trail (with NAV and Entune if that matters) and was able to adjust out of Daylight Saving Time. As I recall there are two buttons to the left of the time that say "Mode" and "Set" with an up arrow on one, and down arrow on the other.
I can't remember how it worked but I found the directions in the manual. You just hit the up or down button as to whether you want the clock to go forward or backward in time. Then I can't remember exactly what made the clock move, but it did.
Sorry I don't have time to look this up again, but hopefully my starting info will get you to where you can figure it out.
Good luck !