{enddate} or {daterange} contains 1 day additionally

Hello,

as I have described above, the widget with the shortcodes {enddate} and {daterange} contain 1 day additionally.

F.e.:
My event is from 2. February – 3. February. But the widget shows 2. February – 4. February. What is the problem?

Thank you.

https://wordpress.org/plugins/my-calendar/