diff --git a/src/langfingaz/parseMeetings.py b/src/langfingaz/parseMeetings.py
index afe6278..93b2415 100644
--- a/src/langfingaz/parseMeetings.py
+++ b/src/langfingaz/parseMeetings.py
@@ -60,10 +60,11 @@ class BbbStatus(object):
 
     pointOfTime: datetime = None
 
-    @classmethod
+    @staticmethod
     def getKey(bbbStatus):
         """
         Returns the date of this object as key for sorting.
+        See also: https://docs.python.org/3.7/howto/sorting.html#key-functions
 
         :return: Key that can be used for sorting
         """