Pacific time zone Guilds on Green server

[Fammaden]

If you're talking about end game raiding, then P99 knows no real time zones anyway. Mobs can spawn around the clock.

For any scheduled raid stuff like Plane of Sky or small game that can be done whenever, you may have to ask around the different guilds when they do stuff and how it fits in with your time zone.

Since you're still leveling I'd just look into Castle or one of the other bigger casual/leveling friendly guilds, they will have people online and active though all US time zones, and not worry about raid times until you get further along and get a feel for how the server really tends to flow.