February 22 - Franchise or transition player tags can be designated. Josh Norman relevance here
February 23-29 - NFL Draft Combine. NFL prospects rise and fall depending on their performance.
March 7 - NFL Free agency begins. Starting at noon, teams can contact and enter into contracts with NFL free agents. Don't look for the Panthers to be active on this day, but rather a couple of weeks later.
April 18 - Offseason workouts can begin for the Panthers
April 28-30 - NFL Draft in Chicago
May 6-9 - Rookie Camp. First look at the new guys and many others trying to get a camp invitation
May - June - OTAs. Panthers meet and engage in "no contact" practices. Our first look at the new squad. Exact dates TBD.
Late July - Training camp begins. (exact dates and schedule TBD)