What is a good excuse to stay out late?

Well I am a teen and i stay out late and i use excuses so my main one is name a bunch of friends that your parents trust or like and then say there staying out for a while. Then your parents will normally ask when is a while then you say I dont know I will call you ok? THAT IS HOW!

That is the original answer. I would try saying that a close (and parent trusted friend) is having a hard time with a loss (family or girlfriend/boyfriend) and wants/needs you. You could also say that you are having problems in a certain subject in school and you and some friends are going to pull an all nighter studying for that subject together.