It starts after midnight, is that EST?
From XM's website
D-Day Invasion of Western Europe
The 40s - XM 4
12:41AM ET
On the 60th Anniversary of this major WWII battle, the 40's Channel presents a special 40-hour real time radio news coverage of the invasion. Beginning with the first bulletin at 12:41 AM on June 6th, 1944, and following through the next day, you won't want to miss this dramatic radio event.
It will be interesting to comapre and (mostly) contrast the coverage with todays media histrionics