Solved

I need help with the calendary

Hello,

Your current league has their final race tomorrow, so you can't edit this season's calendar length. 

To edit next season's length, go into League Settings > Edit League > Schedule > Circuit Selection.
Once you click on Circuit Selection, you should see a list of the 24 available tracks.
To change next season's length, use the toggle at top to add or remove races from the calendar. In order for any changes to save, ensure you have the same amount of races in the left column as is selected with the toggle.

Any changes to race calendars only impact future seasons.

Hello,

Unfortunately it is not possible to change the current season length while the season is ongoing. 

I apologise for any inconvenience this may cause. 

Merry Christmas to you too. ?