Question: when does the regular season start in mlb?
Answer: March 29 , 2018

The 2018 Major League Baseball season began on March 29 , 2018 , and is scheduled to end on September 30 . The postseason will begin on October 2 . The 2018 World Series is set to begin on October 23 , and a potential Game 7 is scheduled on October 31 .