you should be able to go to "settings"...then "date and time" and adjust the settings there. I would post screen shots but I have a Note 4 and I'm not sure if that would be helpful...
Once you're in the settings per @droidprincess 's instructions, check the box marked "Automatic date & time". This will use the network-provided time. Also check the "Automatic time zone" box, otherwise there's a chance it'll default to west or east coast time.