It should be on the Friday (Nov 29) after Thanksgiving (Nov 28), which is the fourth Thursday of November.

Some of the notable deals are:
Monsters, Inc., Lowest price: $9.99 @ KMart
Harry Potter, Lowest price: $9.99 @ Toys 'R Us
Black Knight, Lowest price: $9.99 @ Target
Behind Enemy Lines, Lowest price: $9.99 @ Target
Joyride, Lowest price: $9.99 @ Target
Don't Say a Word, Lowest price: $9.99 @ Target
Shallow Hal, Lowest price: $9.99 @ Target
From Hell, Lowest price: $9.99 @ Target (could be the 1 disk edition)
The Rookie, Lowest price: $11.97 @ Target
Beauty and the Beast, Lowest price: $11.97 @ Target
Grease, Lowest price: $ 12.99 @ BestBuy
Scooby Doo, Lowest price: $ 12.99 @ BestBuy
Sum of All Fears, Lowest price: $ 12.99 @ BestBuy

Complete list of DVDs on sale during Thanksgiving period
BEST BUY
Monsters Inc., Beauty and the Beast, Grease for 12.99
Scooby Doo, Sum of All Fears, Harry Potter for 14.99

KMART (Thanksgiving Day ONLY)
Monsters Inc. $9.99

Toys 'R Us (November 17-20 ONLY)
Harry Potter DVD $9.99

TARGET
PRICES EFFECTIVE: Friday 7:00am-11:00pm, Saturday 8:00am-11:00pm ONLY
Beauty and the Beast, Monsters, Inc., The Rookie: $11.97
Black Knight, Behind Enemy Lines, Joyride, Don't Say a Word, Shallow Hal, From Hell :$9.99