D Day is a term the military uses for, "the day on which a combat attack or operation is to be initiated." -Wikipedia
April 16, 2014 is the last day of the regular season and I believe exit interviews will commence the next day on April 17, 2014. I contend that there will be a mutually parting of the ways. Mike D'Antoni's D-Day (#MikeDDay) is set for April 18, 2014.