When does Zero Chill Boost End?

When is the Zero Chill Strtegy Program Boost ending? These are Deep Freeze +1 SPD/ACC +2 ALL RATINGS, Vince Lombardi +1 ALL RATINGS +3 AWR/PRC. and Stocking stuffers. I thought it would end on Yesterday the 5th. Reason I ask, I sold off most of the cards with this boost, and went back to non-boost Strat Prog without holiday boost. For example, got rid of Wagner for Mike Singletary, Irvin to Branch and switched RG Teller to Delamielleure, C Johnson FS for Sean Taylor, and the list goes on. I lost my shorts in MUT coins holding on to cards from the Halloween Boost. I'm new this year to MUT, and I dont want to make the same mistake. i almost made the mistake holding on to D Henry and I Simmons but sold them off for a million, and repurchased on Monday for half the cost. lol