Following Google Docs "Editors Help" I just tried out the function EOMONTH.
Unfortunately, every example I found there will result in an "Parse Error". Example:
=EOMONTH(DATE(1969, 7, 20), 1)
The same happens with addressing specific cells like
=EOMONTH(A1, 1)
(A1 will contain a valid date)
What is wrong here?
UPDATE:
I'll provide an example-sheet here.