Steps to reproduce:
1. Add the Calendar portlet to a page
2. Add an Event to March 31th, 2016
Expected result: In the mini calendar on the left-hand side of the portlet, the date of this event to be highlighted in bold and there should be a dot beneath the date.
Actual result: The date in the mini calendar is not highlighted in any way.
Similar case for March 30 and 31, 2015