Modify a season
To modify a season, you need to be admin or at least coach of the team.
Go to the sprocket of your team's menu and click on "Manage seasons > Season list".
Then click on "Edit the seasons" and you will have the opportunity to modify the name and dates.
For technical reasons, the seasons should follow each other. For example, if a season finish on the 31st of July 2016, the following one will start by the 1st of August 2016 (even if there are no events on August).
Events within a season
When you create an event, the season of this event will be automatically determined. For example, if a game is set on the 21st of August 2016 and the season 2016-2017 lasts from the 1st of August 2016 to the 31st of July, then the game will be automatically added to the 2016-2017 season.