Finland uses D.M.YYYY, not DD/MM-AA as in the code. So 2013-09-06 (September 6th) should be 6.9.2014 (without leading zeros)
en.wikipedia.org/wiki/Date_format_b
...
Swedish standard is yyyy-mm-dd though others are used. Norwegian is wrong as well.
There might be other errors as well, please check the Wikipedia list.