last year i heard from both pitt and penn on dec 2nd (sorry i know one more day sucks). pitt by phone call-she called the first half of the alphabet on dec. 1st until she lost her voice and finished calling everyone on dec. 2nd. penn i heard from mail.
im not sure what you asked about if someone interviewed before dec. 1st and heard on dec. 1st,
"got ya, did you interview before dec 1st, and hear back on this date?" but i interviewed in mid-nov last year and heard dec. 2nd.