Is this possible with Calendar?

If I created a story in July and none in August would the calendar for September have "July" as the previous month in Antville (I have see this in non-antville weblogs)?

If the previous month was "August", I would like to have "<<" and ">>" as previous/next month (if applicable) at either side of the calendar month/year in the calendar header instead of having the name of the previous/next month in the calendar footer. Is this possible? If it is possible how do I edit the calendar skin?