Feb. 23-29 — NFL combine at Indianapolis.

March 1 — Deadline for clubs to designate franchise or transition players, 4 p.m. EST.

March 9 — Trading period and free agency for 2016 begins, 4 p.m. EST.

March 20-23 — Annual league meeting, Boca Raton, Fla.

April 22 — Deadline for restricted free agents to sign offer sheets.

April 28-30 — NFL draft, Chicago.

May 23-25 — Spring league meeting, Charlotte, N.C.