diff --git a/pandora_server/ChangeLog b/pandora_server/ChangeLog
index b837bdae71..0f570bfebc 100644
--- a/pandora_server/ChangeLog
+++ b/pandora_server/ChangeLog
@@ -1,3 +1,8 @@
+2010-12-22  Ramon Novoa  <rnovoa@artica.es>
+
+	* lib/PandoraFMS/Core.pm: Fixed day name array. 0 corresponds
+	  to Sunday. Fixes bug #3122177.
+
 2010-12-22  Sergio Martin <sergio.martin@artica.es>
 
 	* util/pandora_manage.pl: Fixed codification bug in the
diff --git a/pandora_server/lib/PandoraFMS/Core.pm b/pandora_server/lib/PandoraFMS/Core.pm
index be696257bd..e9df68bde7 100644
--- a/pandora_server/lib/PandoraFMS/Core.pm
+++ b/pandora_server/lib/PandoraFMS/Core.pm
@@ -163,7 +163,7 @@ our @EXPORT = qw(
 	);
 
 # Some global variables
-our @DayNames = qw(monday tuesday wednesday thursday friday saturday sunday);
+our @DayNames = qw(sunday monday tuesday wednesday thursday friday saturday);
 our @ServerTypes = qw (dataserver networkserver snmpconsole reconserver pluginserver predictionserver wmiserver exportserver inventoryserver webserver);
 our @AlertStatus = ('Execute the alert', 'Do not execute the alert', 'Do not execute the alert, but increment its internal counter', 'Cease the alert', 'Recover the alert', 'Reset internal counter');