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.
In terms of the weekend, I can do Saturday in either (not both) of these: 10:30am-12:30pm or roughly 2pm to no later than 4pm (all my time). Sunday I have 6:30 to no later than 8am, and possibly the evening.
fwiw I can't do Tuesday anymore, something came up at work.