Index: trunk/tools/czartool/DayMetrics.pm
===================================================================
--- trunk/tools/czartool/DayMetrics.pm	(revision 29863)
+++ trunk/tools/czartool/DayMetrics.pm	(revision 30099)
@@ -37,6 +37,8 @@
     $self->{day} = $_[6];
 
+    my $yesterday =  $self->{czarDb}->subtractInterval($self->{day}, "1 DAY");
+
     # sort out times
-    $self->{begin} =  "$self->{day} 06:00";
+    $self->{begin} =  "$yesterday 18:00";
     $self->{end} = $self->{czarDb}->addInterval($self->{begin}, "1 DAY");
     $self->{burntoolEnd} = $self->{czarDb}->addInterval($self->{begin}, "12 HOUR");