They've always relied on Friday morning drops to Madden nfl 22 coins coincide with each major promotion in Madden 22 Ultimate Team and they may kick the game off this week or the following.
Either way, we'll likely receive the teaser on a Wednesday edition of Good Morning Madden, get a reveal of the program for the majority of the players on the next Thursday's edition Good Morning Madden, and that'll culminate in the program's release at the beginning of Friday. That could put the program's first release as early as three days before Christmas in 2021, but historically, they've waited to a bit later in the month before kicking things off which is why the most likely date is to be around December 10, 2021.
One thing you can count on out of Zero Chill or any other possible MUT Christmas Promo that's revealed, is that you'll receive new cards to play in Madden 22 Ultimate Team. The programs tend to come with additional challenges and cheap Mut 22 coins missions and all of them revolve around a group of new cards that players push to add to their own Ultimate Team.