Creating a season is a pre-requisite to create products.
If you wish to keep key items from the existing season to the new season, such as tariffs, we recommend you to DUPLICATE the season that contains those parameters. You can then check items you want to copy to the new season.
If not, you can just click on NEW to create a new empty season. The season has start and end date. The sales can start prior to the season start, but you will not be able to create a product that has a date before the beginning of the season. The season dates particularly matter if you sell memberships or passes that are valid every day the season in which it is sold.