It changes. Last April FD was available online starting at 5:30am. Last Fall, the room-only discount dropped shortly after 8am and then another offer dropped approx 45 mins after that.
I keep hoping we'll see a new offer drop tomorrow but when I looked back at historical info, the past 2 years it's been 5-7 days between one offer ending in late December and the next one starting. Not saying that will happen this time but it is a possibility.
Until it drops I'll be refreshing my phone every time I wake up at night.