When I put a range into the air calendar and look at the “list of dates” it’s usually the completely expected result. but specifically when I pick a range that ends on march 31st it will include April 1st in the range even though I am not selecting April 1st. It doesn’t happen at the end of any other month.
the repeating group in this image is just set to display the “list of dates” currently selected in the calendar and you can see I am only selecting UP TO the 31st.