By default, the view now beings at the beginning of the Fall semester, instead of 8 weeks ago. The old view of 8-weeks is still available under the “X-Axis” display option.
When you highlight a school (and the beginning of the Fall semester is in range), an indicator of the beginning of the semester is added to the graph.
An additional indicator has been added for the last day of in-person instruction. (Some Big Ten schools are completely finished with the semester, like Nebraska, while others are fully online for the rest of the term like Illinois.)