Ok, going by memory ron so please excuse any inaccuracies, and it's for a pansat 2700 but it should be the same if not similar. You can probably follow along and if the steps aren't exactly correct you can probably figure it out anyway.
menu/user setup/highlight time click ok/highlight time again click ok/enter in the hours/minutes using the key pad keeping in mind that it's a 24 hr clock so you'll need a leading zero if setting before 10am. once done click ok to save and exit out. It doesn't' keep the most accurate time, at least mine doesn't but it'll make your EPG work better.