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The Green Bay Packers officially will begin preparing for the 2017 NFL season April 18.

The NFL on Monday released the key dates for all 32 teams regarding the voluntary nine-week offseason program. As part of that preparation, the Packers will conduct their organized team activities on May 22-24, May 31, June 1-2 and June 6-9, with mandatory minicamp scheduled for June 13-15.

All dates are subject to change. One OTA practice per week and all of the minicamp practices typically are open to the public, although the Packers usually cancel one in favor of a team-building exercise.

The Packers' preseason schedule is expected to be released in early April, with the regular-season schedule due out in the middle of the month.