Mouse over text problem

Hello,
I'm having trouble with my Events Calendar. When people mouse over the event they see all kinds of html.
http://3e1.22a.myftpupload.com/events/
or
https://jokes.chuckroy.com/shows/
I use the same calendar on other blogs and the mouseover is fine.
https://coloradocomedyshows.com/shows/month/
What am I doing wrong? :slight_smile: Thanks for helping.