regular season ends sept 30...barring any tiebreaker playoff game...
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2001 Major League Baseball Calendar
July 10 -- MLB All-Star game - Seattle
July 31 -- Last day to trade player without waivers
August 5 -- Hall of Fame inductions - Cooperstown, New York
August 6 -- Hall of Fame game - Cooperstown, New York
(Florida vs. Milwaukee)
August 31 -- Deadline for postseason rosters.
September 1 -- Active rosters increased to 40 players
October 2 -- MLB Playoffs begin
October 9 -- League championship series begins
October 20 -- World Series begins -
city of National League champion.
October 31 -- Collective bargaining agreement expires