diff --git a/src/month/monthitem.cpp b/src/month/monthitem.cpp
--- a/src/month/monthitem.cpp
+++ b/src/month/monthitem.cpp
@@ -249,7 +249,7 @@
         }
     }
 
-    return leftStartDate < rightStartDate;
+    return leftStartDate > rightStartDate;
 }
 
 bool MonthItem::greaterThanFallback(const MonthItem *other) const