How do you set the time?

This may sound like a hilarious question...but i can't figure it out. At least i take a little solace that in the user manual under "clock" it is not mentioned. I do see i can "sync time with gps" but i don't want to do that, as i want to set time different from what gps gives. Surely there must be some user option to set the time? Please explain if you know how to do it. Thank you.