An age ceiling percentage. Really man. It’s youth sports. This isn’t physics. Stop already. Stop making this difficult. It’s black and white. There is a date cutoff. Kids should play the same year. I have 3 kids, one is a summer baby. Too bad on him, he will be 10 or 11 months younger than others. That’s life, sorry. He will he youngest on team. Oh well. Life goes on. Kids aren’t 2 or 3 years older, maybe 11 months. That’s the way it goes.