What day of the week was December 31, 2006?

The day of the week December 31st, 2006 fell on was a Sunday. Eid-al-Adha for Muslim people.

Seymour Martin Lipset the American sociologist, author, and academic (b. 1922) died on this day in 2006. As did George Sisler the Jr., American businessman (b. 1917) .