Rising COVID-19 infection and death rates are prompting colleges and universities that are hoping for in-person instruction in 2021 to again shift their calendars and push back the start of the spring semester. After adjusting their calendars last year -- including eliminating spring and fall breaks to reduce student travel and spread of the coronavirus, and delaying the start of the spring semester to make it safer to have in-person instruction -- many institutions are now scrambling again to respond to the changing picture on the ground. - Victor Restis