Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
I'm GMT-5 and I can sometimes manage 1 or 2 PM - 8 PM and 11:30 PM - 6 AM. Sometimes I'll be working in the lab and if I am, then I'll probably get back before 5 or 6 or 7 PM.