how to convince your parents to let you out to parties?

ive turned down parties for two years now, and I asked my parents for the first time this year and they said no cause I have tryouts. I told them I'll come back at 11, and they said that was too late since tryouts is at 8:30am. but I take relatively hard classes so they know I stay up late everyday to do work and study ex. all nighters, sleeping for only two-three hours and still getting up early. I don't know if they don't want me to go to parties in general or bc of tryouts. I see all my friends partying I have sm fomo, I just want to go out and live a little... any advice would be great. ╥﹏╥