How is December 31 stay credited?

Discussion created by kgahome on Dec 18, 2016
Latest reply on Dec 18, 2016 by snail5930

I have an upcoming one-night stay at a U.S. Marriott property scheduled for December 31, checking out on January 1. My question: For the purpose of determining elite status, will this count as a 2016 night or a 2017 night? As I have already qualified for Platinum based on previous 2016 stays, I am hoping the latter, but from the information I have been able to find am not sure. Thanks to any of you experts out there who can clarify!