Index: /trunk/FACT++/src/EventBuilderWrapper.h
===================================================================
--- /trunk/FACT++/src/EventBuilderWrapper.h	(revision 19771)
+++ /trunk/FACT++/src/EventBuilderWrapper.h	(revision 19772)
@@ -201,4 +201,7 @@
         }
 
+        // WARNING: This fails if the sun-rise is around midnight UTC!
+        // It would be more appropriate to relate the "NightAsInt" to
+        // the LOCAL time of sun-rise!
         ostringstream str;
         if (fNightAsInt==0)