1. Open My Calendar on the red menu bar.
2. Click the Leagues tab above the calendar.
3. Select the checkboxes for any leagues in which you would like to participate this season.
4. Click the Save leagues in my calendar button below the list of leagues. You will see a pop-up telling you the calendar was saved.

That’s it. Whenever you return to your calendar, you’ll see checkboxes for the league(s) you selected.