if you grant me access to your actual calendar control, I'd be happy to a sample coded step for you.
I wrote the code after examining the DOM structure of the calendar (screenshot 1):
HtmlDiv cld = Find.ByAttributes<HtmlDiv>(
//We see that the class is a good way to locate the calendar;
//Let's scroll down to the table so that we ca view it
HtmlTable tbl = cld.Find.AllByTagName<HtmlTable>(
//the calendar is actually a table element
HtmlTableCell tt = tbl.Find.ByContent<HtmlTableCell>(
//each date in the calendar is actually a table cell. Look for the cell inside of the table that has the number 15;
//Click on the desired date
I hope this example gives you an idea how to deal with your own automation challenge.
the Telerik team