Fixed invalid dates in input

Change-Id: I95e28499de2afca536e9d02e9d75e2d63abede1b
diff --git a/Changes b/Changes
index 9ba81de..411b86a 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,6 @@
-0.55.8 2017-02-15
+0.55.8 2017-04-28
         - [feature] Retrieve and display pagebreaks (diewald)
+        - [bugfix] Handle invalid dates in input (diewald)
 
 0.55.7 2017-01-24
         - [bugfix] Sorted results in unordered element distance query results (margaretha)