module shows wrong month

We have a calendar module on the homepage here - www.messerfinancial.com/ . It works great when there's only one event on a day, like Feb 16 or 17. On Feb 18 we have two events. If you click Feb 18, it goes to a page where the calendar module shows the wrong month, June. How can we fix that?

Hi Barbara

Seems you changed something. On Fed 18, there is only one event now and I don't see the issue ?

Tuan