It depends on which ticket you purchased! See below for more details:
12:00 Noon: Ticket holders holding the “All Of Me” tickets will be let onto the convention floor and into a special backstage session with their favorite creators. This VIP ticket package gives you time without the crowds
1:00 PM: Meet Me and See Me ticket holders with a sound check pass will be let in for early access
1:30 PM: See Me, and all ticket holders will be in the venue for a show put on by the 99 Goonsquad, Mario Selman, and other featured creators in that city. Performances will include singing, DJ sets, and include fan interaction with the creators.
3:00 PM: Meet Me and All of Me ticket holders will be allowed to meet 99 Goonsquad, Mario Selman, and other featured creators.
6:00 POMSCON ENDS, the Meet & Greet will wrap up and POMSCON will be finished!
*Note that Phoenix timings are different