eZ Webin (also in ezflow) date/datetime edit template uses the ezdatepicker.js script for selection of date. However the navigation on this calendar is screwed up, it doesn't find the navigation icons, and display a long explanation text that overlaps the selection calendar.
I've looked at it quickly, and part of the problem is that the calendar css is under var/, while the icons are under yui in the design. Also, the overlapping text is in the content of the tag, and can't be removed by css.
Edit any content object with a date/datetime attribute. Click on the calendar selection icon.