The PC game's open doors event starts at one minute past midnight, US Central
Time (18:01 Central Europe, 1:01am Friday 16 in Singapore) and runs until Monday
the 19th, 2am (8:00am Central Europe, 3pm Singapore).
It's not entirely open access -- player characters can progress up to level
15 and are restricted to exploring a few of the game's zones, for example, but
there's plenty of time to evaluate whether the PC game is worth $60 up front and
then $15 per month thereafter.
Another popular MMO, Rift, used free weekends to boost interest
early in its lifespan. Now, like World of Warcraft, it instead offers
Rift Lite as a year-round taster, but caps player progress in order to
encourage subscription.
Star Wars: The Old Republic - Weekend Pass: swtor.com/weekendpass