Eid-al-Adha is expected to be on December 20, 2007 (Thursday) in Middle-East, most of Africa, South America, and North America.

[ Moonsighting.com ]

DC Eid committee has coordinated one big Eid Prayer for the DC area, which is cool, but they aren't so convinced about the date:

Wed Dec 19 or Thu Dec 20, 2007

[ Official DC EID Site ]

Guess we'll have to wait another week to see what they decide...

Update: The Fiqh Council of North America has a press release that addresses the confusion. Apparently Eid-al-fitr is clearly defined by the moon and in their opinion fully calculable. Eid-al-adha, however, is defined by hajj and the actions of the hajjaj in Saudi Arabia, so in their opinion Eid-al-adha is set by Saudi Arabia when they set the time for the hajj activities. And since this year Saudi Arabia announced that the 1st of Dhul-hajjah is December 10th on our calendar, it should follow that Eid will be on the 19th. DCEid website hasn't been updated yet, though.

Update: DC Eid committee has posted that prayers will be on Wed. Dec. 19th.

Update: IMAAM concurs.