Feb. 4 - Super Bowl at Minneapolis.
Feb. 20 - First day for clubs to designate franchise or transition players.
Feb. 27-March 5 - NFL combine in Indianapolis.
March 6 - Deadline for clubs to designate franchise or transition players.
March 14 - 2018 league calendar begins, free agency opens, trades allowed.
March 25-28 - Annual league meeting, Orlando.
April 2 - Clubs that hired a new head coach after the end of the 2017 regular season may begin offseason workouts.
April 16 - Clubs with returning head coaches may begin offseason workout programs.
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