Depending on how you want to use your calendar, you might want to show (or hide) empty days in your calendar. You can easily do this by unchecking “Show Empty Days” in the embedding configuration screen for your calendar. The only calendar view in which you can hide empty days is Event View.
Hiding empty days in your calendar using the “Embedding Configuration Screen"
Follow the steps in the image below:
To see what your calendar would look like with hidden days in Event View, see the image below:
Conversely, if you would like to show empty days in a Full Calendar with event view, check the “Show Empty Days” box at the bottom of the embedding editor screen.