To chime in, IME all eastbound TATL Co flights have dinner served....in fact over the weekend I flew TATL but we departed 2.5 hrs late at 12:30 AM and still we were served dinner at 1:30 AM (5:30AM local time for our arrival city because of DST differences).

Call it Dinner or Breakfast it doesnt really matter to me, just make sure you have a bacardi rum bottle on board to wash it down...