diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/web/calendars/BaseCalendarCRUDController.java b/navalplanner-webapp/src/main/java/org/navalplanner/web/calendars/BaseCalendarCRUDController.java
index 161e9c936..ba4dcc61e 100644
--- a/navalplanner-webapp/src/main/java/org/navalplanner/web/calendars/BaseCalendarCRUDController.java
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/web/calendars/BaseCalendarCRUDController.java
@@ -490,6 +490,9 @@ public class BaseCalendarCRUDController extends GenericForwardComposer {
             treerow.appendChild(operationsTreecell);
 
             item.appendChild(treerow);
+
+            // Show the tree expanded at start
+            item.setOpen(true);
         }
 
     }