March 26 - Opening day, active rosters reduced to 26 players.
April 18-19 - San Diego vs. Arizona at Mexico City.
April 28-30 - New York Mets vs. Miami at San Juan, Puerto Rico.
June 3-4 - Owners meeting, New York.
June 10-12 - Amateur draft, Omaha, Neb.
June 15 - International amateur signing period closes.
July 2 - International amateur signing period opens.
July 10 - Deadline for drafted players to sign, except for players who have exhausted college eligibility.
July 14 - All-Star Game at Los Angeles.
July 26 - Hall of Fame induction, Cooperstown, N.Y.
July 31 - Last day during the season to trade a player.
Aug. 23 - Boston vs. Baltimore at Williamsport, Pa.
Aug. 31 - Last day to be contracted to an organization and be eligible for postseason roster.
Sept. 1 - Active rosters expand to 28 players.
Sept. 29-30 - Wild-card games.
Oct. 20 - World Series starts.
October TBA - Trading resumes, day after World Series.
November TBA - Deadline for teams to make qualifying offers to their eligible former players who became free agents, fifth day after World Series.
November TBA - Deadline for free agents to accept qualifying offers, 15th day after World Series.
Dec. 2 - Last day for teams to offer 2021 contracts to unsigned players on their 40-man rosters.
Dec. 6 - Hall of Fame Golden Days Era committee vote announced, Dallas.
Dec. 7-10 - Winter meetings, Dallas.
More AP MLB: https://apnews.com/MLB and https://twitter.com/AP-Sports