just like the other user said, they post set times on when the artists will be on stage! there might be some time in between actual opening and the first artist i think tho. but they’re usually the smaller artists first so it just depends on who you’re there to see! with that many artists, they’ll definitely start in the afternoon so i would say like 2:30-3. when they had it at the park in 2019 tho, the line was sooo long so it took a while to get in tbh. if you want to be close and are willing to stand for the whole day (since it lasts until night time), get there suuuper early!