I'm betting on Thursday, though I could never get the hang of Thursdays. Tomorrow would be too obvious, and Friday a bit smarmy. Of couse they could throw in the classic Austrian Roundabout and go for next monday. That's the oldest trick in the book...
I have been one of the many "guests" watching the thread, but I decided I'd get in on the fun. Mostly I'm too lazy to log into fastlane myself with all those letters and numbers and such I have to type in so I'm going to see when all the frantic people on this board find its been posted.
So this question was probably already answered in this enormous thread, but if you are awarded the GRFP (which I am not all that optimistic) can you defer it for a year? I have been offered a first year fellowship at one of my top choices and it would be nice to be able to keep that the first year and do NSF after that.