Forbes magazine recently published the most dangerous holidays for drivers:
http://www.forbes.com/2008/11/06/dangerous-driving-holidays-forbeslife-cx_jd_1106travel_slide.html?thisSpeed=15000
Rounding out the top five are:
No. 1 Thanksgiving Average Vehicular Deaths: 573
No. 2 Independence Day Average Vehicular Deaths: 505
No. 3 Memorial Day Weekend Average Vehicular Deaths: 493
No. 4 Labor Day Weekend Average Vehicular Deaths: 488
No. 5 New Year's Eve/Day Average Vehicular Deaths: 421