April Fools Effect

The use of April 1st to break any serious news in order to make the victim(s) think it's a joke until after April 1st, where the victim(s) realize it's for real.

April 1st
Boss: Sorry Joe, you're fired. *Wink*
Joe: Ohhh, of course sir *wink*

April 31st
Joe: I wonder when i can return... fuck, April Fools Effect