March 28 — Opening day for other teams, active rosters reduced to 25 players.
April 13-14 — St. Louis vs. Cincinnati at Monterrey, Mexico.
May 4-5 — Houston vs. Los Angeles Angels at Monterrey, Mexico.
June 3 — Amateur draft starts, Secaucus, N.J.
June 13 — Detroit vs. Kansas City at Omaha, Neb.
June 15 — International amateur signing period closes.
June 19-20 — Owners meeting, New York.
June 29-30 — New York Yankees vs. Boston at London.
July 2 — International amateur signing period opens.
July 9 — All-Star Game at Cleveland.
July 21— Hall of Fame induction, Cooperstown, N.Y.
July 31 — Last day to trade a player without securing waivers.
Aug. 18 — Pittsburgh vs. Chicago Cubs 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 40 players.
Oct. 1-2 — Wild-card games.
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 2020 contracts to unsigned players on their 40-man rosters.
Dec. 8 — Hall of Fame Modern Baseball committee vote announced, San Diego.
Dec. 9-12 — Winter meetings, San Diego.