Calendar Control Not Updating

I have a page with 4 calendars and one listview.  When the page loads the dates that are in the database highlight on the different calendars.

If I click on the dates and click save the listview updates fine.

The problem is if I update the listview either by deleting or updating the items in the listview the calendars do not update unless I do a full page update by clicking refresh.

I am also using AJAX with the update panel.  I have tried calendar1.databind when the listview event rowdeleted.  No dice.  Any other suggestions?  I understand  the OnDayRender event takes place at the server.  How can I call the OnDayRender event to run after the listview is updated?