July 20, 1969.
The JFK funeral.
The Reagan funeral.
I'm with you. For those of us old enough to have viewed it at the time, Neil Armstrong's first steps on the moon seemed like a miracle. I can't describe the feeling of suspense, awe and wonder. The rest of the world stopped, and was with us, for that one day.
Another special moment for those of us around at the time was the special Apollo 8 Christmas Eve broadcast, "In the beginning, God..."
http://space.about.com/cs/spaceevents/a/apollo8xmasmsg.htm