It’s the only explanation I can think of.
Checking this afternoon to see what the U.S. Congress is up to today, I see this notice on the official web site of the Senate:
“Monday, Apr 15, 2013 2:00 p.m.: Convene and begin a period of morning business.”
Morning business at 2:00 PM Eastern Time? Apparently Congress has moved the U.S. Capitol Building to Pacific Time.
I’ll investigate this further, but first I’m going to have some breakfast.