Sept. 1 — Active rosters expand to 40 players.
Sept. 30 — Postseason begins.
Oct. 22 — World Series begins, city of American League champion.
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, 12th day after World Series.
Nov. 10-12 — General managers’ meetings, Phoenix.
Dec. 2 — Last day for teams to offer 2015 contracts to unsigned players.
Dec. 8-11 — Winter meetings, San Diego.
Dec. 8 — Hall of Fame golden era (1947-72) vote announced, San Diego.
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WTOP breaks down fun things to see and do around the D.C. area this month.