March 12 _ Before 4 p.m. EDT, clubs must exercise options for 2013 on all players who have option clauses in their 2012 contracts; clubs must submit qualifying offers to their restricted free agents with expiring contracts and to whom they desire to retain a right of first refusal/compensation; clubs must submit a minimum salary offer to retain exclusive negotiating rights to players with expiring 2012 contracts and who have fewer than three seasons of free agency credit; all 2012 player contracts expire. All clubs must be under the salary cap. The 2013 league year, free agency and trading period begins at 4 p.m. EDT.
March 17-20 _ Annual league meeting, Phoenix
April 25-27 _ NFL draft, New York
May 20-22 _ NFL spring league meeting, Boston
Sept. 5, 8-9 _ 2013 NFL season begins.
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