What day of the week was December 31, 2009?

The day of the week December 31st, 2009 fell on was a Thursday.

Cahal Daly the Irish cardinal and philosopher (b. 1917) died on this day in 2009. As did Justin Keating the Irish surgeon, journalist, and politician (b. 1930) , Erica Boyer the American porn actress (b. 1956) .

Both a blue moon and a lunar eclipse occur.