You can see the schedule over at the
Virtual PaizoCon 2020 Warhorn. Events run next week from Tuesday to Sunday. The main RPG slots are:
- Midnight-5 AM
- 6-11 AM
- Noon-5 PM
- 6-11 PM
in the Pacific time zone.
Sticking to office hours, I'd guess you'd want to start around 11:15-11:30.