4 day free trial, from Thursday, March 15 at 12:01AM CT through to Monday, March 19 at 2:00AM CT, which I think is from 4pm AEDT tomorrow here in Oz?
Link to Weekend Pass Free Trial FAQ:
http://www.swtor.com/info/faq/game#q400211
Some of the details:
- Anyone who has never had an active game account for Star Wars: The Old Republic is eligible for the Weekend Pass Free Trial.
- There is a limit of one free trial per account.
- Weekend Pass Free Trial accounts cannot participate in any other free trial program.
- A Weekend Pass Free Trial character cannot exceed level 15. The player will be notified via in-game notifications and chat message once they have hit the maximum level for the trial experience.
- A Weekend Pass Free Trial character will only be able to play on their Origin World, Capital World, the Fleet, all Warzones, and in their first Flashpoint. A message box will appear if a character attempts to go outside of these areas.
- A Weekend Pass Free Trial character will not be able to use general chat, trade chat, or PvP chat. The character will only be able to use local chat, group chat, guild chat, and reply to whispers.
- A Weekend Pass Free Trial character will not be able to send or reply to mail by other trial characters. However, your character will be able to receive in-game mail during the trial.
- A Weekend Pass Free Trial character will not be able to use the Galactic Trade Network or trade with other players.
- A Weekend Pass Free Trial character will only be able to level their Crew Skills ranking to around 40.
- A Weekend Pass Free Trial character will not be able to earn Legacy XP.
If you were in the beta or one of the beta weekends like me, you might want to wait to see if they send you a 7-day trial instead — which gives you more game time, and can be activated anytime in the next 2 weeks (rather than being limited to just this weekend). Or if you're super cheap, you could even create another account to take advantage of both this weekend pass and the 7-day trial. ;)
This is the text of the email I just received this morning: