The output is a small library that enables you to display a date-range like 12. – 13. March 2015 instead of 12. March 2015 – 13. March 2015.
It also displays March 12th – March 13th 2015 if you want to.
Not that easy any more.
I won’t bother you with the details on how it’s done (it seemed more difficult than it actually was) as you can see that in the source-code if you are interested.