The clock is counting down to 3:00 EDT, 12:00 PDT. You folks in other time zones can math it out yourselves.
At the time of this writing, there are three hours left until role-playing enthusiasts around the world either all cheer at once, or hang their heads in disappointment. The countdown on the Baldur's Gate teaser site will be reaching zero in just a few hours and we'll see what's in store for the storied franchise.
We'll be updating with more info as it comes in.
Source: Baldur's Gate Teaser Site