How to go on a date w/out your parents knowing I PICK BEST ANSWER.!?

So im going out with this one guy who asked me out(obviously sorry) and he asked me out on a date so i said sure. Were going to the movies but i dont know how to ask cuz my dad always says how im too young to date(im 12 and live w/ my mom) so i want an excuse to go to the movies or something like that without my mom knowing its a date. please help.!!