Baseball is generally considered a spring sport, though technically it is played during at least part of all four seasons. No matter whether you are talking about major league, minor league, or college baseball.
MAJOR LEAGUE BASEBALL
The Major League Baseball regular season starts around April 1st and ends around the October 1st. From 2016-2029, the World Series ended between October 28th – October 30th. For example, here are the start and end dates for the last five regular seasons (omitting COVID-impacted 2020):
| Start Date | Regular Season End Date | Postseason End Date | |
|---|---|---|---|
| 2021 | April 1, 2021 | October 1, 2021 | Season Not Ended |
| 2019 | March 20, 2019 (international opener)March 28, 2019 (domestic opening day) | September 29, 2019 | October 28, 2019 |
| 2018 | March 29, 2018 | October 1, 2018 | October 28, 2018 |
| 2017 | April 2, 2017 | October 1, 2017 | October 29, 2017 |
| 2016 | April 3, 2016 | October 2, 2016 | October 30, 2016 |
MINOR LEAGUE BASEBALL
The minor league baseball season starts between April 4 and April 6th, and it ends the first week of September. The minor league baseball playoffs may last until around September 18th. . Here is summary of the start and end dates for the last five regular seasons (omitting COVID-impacted 2020):
| Start Date | Regular Season End Date | Postseason End Date | |
|---|---|---|---|
| 2021 | April 6, 2021 | September 19 | Season Not Ended |
| 2019 | April 4, 2019 | September 2, 2019 | September 15, 2019 |
| 2018 | April 5, 2018 | September 3, 2018 | September 16, 2018 |
| 2017 | April 5, 2017 | September 4, 2017 | September 18, 2017 |
| 2016 | April 6, 2016 | September 7, 2016 | September 18, 2016 |
NCAA DIVISON I BASEBALL
The college baseball season starts in the middle of February and ends with the College World Series played at the end of June. Here are the start and end dates for the last five college baseball seasons:
| Start Date | Regular Season End Date | Postseason End Date | |
|---|---|---|---|
| 2021 | February 19, 2021 | May 22, 2021 | Season Not Ended | no later than June 30th |
| 2019 | February 15, 2019 | May 18, 2019 | June 26, 2019 |
| 2018 | February 12, 2018 | May 19, 2018 | June 28, 2018 |
| 2017 | February 13, 2017 | May 16, 2017 | June 27, 2017 |
| 2016 | February 19, 2016 | May 17, 2016 | June 30, 2016 |
