Here are important league dates for 2019:

April 25-27: 2019 NFL Draft (Nashville, Tenn.)

May 20-22: Spring League Meeting (Key Biscayne, Fla.)

June 3: Deadline for prior club to send "June 1 Tender" to its unsigned Restricted Free Agents who received a qualifying offer for a right of first refusal only in order for such player to be subject to the CBA's "June 15 Tender" provision.

July 15: Deadline for any club that designated a Franchise Player to sign such player to a multiyear contract or extension. After this date, the player may sign only a one-year contract with his prior club for the 2019 season, and such contract cannot be extended until after the club's last regular season game.
Mid-July: Clubs are permitted to open preseason training camp for rookies and first-year players beginning seven days prior to the club's earliest permissible mandatory reporting date for veteran players.

Aug. 1: Hall of Fame Game (Canton, Ohio)
Aug. 31: Clubs must reduce rosters to a maximum of 53 players on the Active/Inactive List.

Sept. 1: Claiming period for players placed on waivers at the final roster reduction will expire at noon, New York time. Clubs may establish a practice squad of 10 players.
Sept. 5, 8-9: Regular Season Week 1