NBC's formerly fabulous (and hopefully continuing to be fabulous, following the departure of showrunner Dan Harmon) Community was supposed to return on October 19th. That was Friday. Except it didn't.
At the last minute, NBC decided not to air it and hasn't yet come up with a new premiere date. Feeling slightly sarcastic about the whole thing, the cast and crew have put together a very special 'Troy and Abed in the morning' to explain why every day is really October 19th.
Incidentally, Chevy Chase doesn't appear to be enjoying the way the show is going at the moment, by the sounds of it.