Princeton will launch a two-week Wintersession in January 2021 and students, faculty and staff are invited to help shape plans for the new program. The first Wintersession is scheduled for Jan. 11-24, 2021, as part of the University’s new academic calendar.

https://www.princeton.edu/news/2019/10/14/planning-princetons-new-wintersession-will-involve-campus-community