In our website we are using a Calendar Plus module to display our events
We have events which take multiple days and we added a background to those events to make it a bit interactive and to show when the events are taking place

The issue we are running up against is that now almost every day is set as an event instead of only the first day of the event, so the calendar looks very full even though its not
Is it possible to add a class or something to the start date so we can only display the background on the first day, or is it possible to only display the starting date in this calendar instead of all the days on an event?

I've added a screenshot of our module settings