Originally Posted by
TerryK
Yeah, but you need to vacate your room by the stroke of midnight on Dec 31st.

SPG.com shows no room available on Dec 31st or later. You can no longer book it now.
It is more likely upon hearing the news the loyal Westin customers have all booked Dec. 31st date so they can claim they are the last customers at Westin. It happens when a place is going out of business, the last few days the business are packed with loyal customers seeking to cherish the memories.
I really doubt they will kick people out by stroke of midnight, although technically Westin no longer owns that place passed that.