diff --git a/lib/admin/Controller/dashboard.pm b/lib/admin/Controller/dashboard.pm
index b2fe464..7418001 100644
--- a/lib/admin/Controller/dashboard.pm
+++ b/lib/admin/Controller/dashboard.pm
@@ -60,6 +60,7 @@ sub system : Local {
 
     $c->stash->{ctx} = "system";
     $c->stash->{plotdata} = \@plotdata;
+    $c->stash->{tz_offset} = admin::Utils::tz_offset();
 
     return 1;
 }
@@ -80,6 +81,7 @@ sub voip : Local {
 
     $c->stash->{ctx} = "voip";
     $c->stash->{plotdata} = \@plotdata;
+    $c->stash->{tz_offset} = admin::Utils::tz_offset();
 
     return 1;
 }
diff --git a/lib/admin/Utils.pm b/lib/admin/Utils.pm
index ed25881..5c020cf 100644
--- a/lib/admin/Utils.pm
+++ b/lib/admin/Utils.pm
@@ -544,4 +544,9 @@ sub addel_iplist {
     return 1;
 }
 
+# returns the offset in localhost's timezone to GMT
+sub tz_offset {
+    return strftime ("%z", localtime(time));
+}
+
 1;
diff --git a/root/js/jsrrd/jsrrd/rrdFlot.js b/root/js/jsrrd/jsrrd/rrdFlot.js
index ba6bf15..a5ab22c 100644
--- a/root/js/jsrrd/jsrrd/rrdFlot.js
+++ b/root/js/jsrrd/jsrrd/rrdFlot.js
@@ -26,11 +26,18 @@ function suffixFormatter(val, axis) {
 		return val.toFixed(axis.tickDecimals) + " B";
 }
 
-function rrdFlot(html_id, rrd_file, graph_options, ds_graph_options, si_suffix) {
+function rrdFlot(html_id, rrd_file, graph_options, ds_graph_options, si_suffix, tz_offset) {
   if(si_suffix==null)
-	this.si_suffix = false;
+    this.si_suffix = false;
   else
-	this.si_suffix = si_suffix;
+    this.si_suffix = si_suffix;
+
+  // tz_offset: offset of timezone in hours
+  if(tz_offset==null)
+    this.tz_offset = 0;
+  else
+    this.tz_offset = tz_offset;
+
   this.html_id=html_id;
   this.rrd_file=rrd_file;
   this.graph_options=graph_options;
@@ -182,7 +189,8 @@ rrdFlot.prototype.drawFlotGraph = function() {
   } 
 
   var flot_obj=rrdRRAStackFlotObj(this.rrd_file,rra_idx,
-				  ds_positive_stack_list,ds_negative_stack_list,ds_single_list);
+    ds_positive_stack_list,ds_negative_stack_list,ds_single_list,
+    this.tz_offset);
 
   for (var i=0; i<flot_obj.data.length; i++) {
     var name=flot_obj.data[i].label;
diff --git a/root/js/jsrrd/jsrrd/rrdFlotSupport.js b/root/js/jsrrd/jsrrd/rrdFlotSupport.js
index 499aca1..f9062c0 100644
--- a/root/js/jsrrd/jsrrd/rrdFlotSupport.js
+++ b/root/js/jsrrd/jsrrd/rrdFlotSupport.js
@@ -99,7 +99,10 @@ function rrdRRA2FlotObj(rrd_file,rra_idx,ds_list,want_ds_labels,want_rounding) {
 //  of the stack is invalid
 function rrdRRAStackFlotObj(rrd_file,rra_idx,
 			    ds_positive_stack_list,ds_negative_stack_list,ds_single_list,
-			    want_ds_labels,want_rounding,one_undefined_enough) {
+			    want_ds_labels,want_rounding,one_undefined_enough,tz_offset) 
+  
+  var timestamp_shift = 3600 * tz_offset;
+
   var rra=rrd_file.getRRA(rra_idx);
   var rra_rows=rra.getNrRows();
   var last_update=rrd_file.getLastUpdate();
@@ -114,8 +117,7 @@ function rrdRRAStackFlotObj(rrd_file,rra_idx,
   }
 
   var first_el=last_update-(rra_rows-1)*step;
-
-  var out_el={data:[], min:first_el*1000.0, max:last_update*1000.0};
+  var out_el={data:[], min:(first_el+timestamp_shift)*1000.0, max:(last_update+timestamp_shift)*1000.0};
 
   // first the stacks stack
   var stack_els=[ds_positive_stack_list,ds_negative_stack_list];
@@ -164,7 +166,7 @@ function rrdRRAStackFlotObj(rrd_file,rra_idx,
 	  }
 	  // fill the flot data
 	  for (var id=0; id<tmp_nr_ids; id++) {
-	    tmp_flot_els[id].data.push([timestamp*1000.0,ds_vals[id]]);
+        tmp_flot_els[id].data.push([(timestamp+timestamp_shift)*1000.0,ds_vals[id]]);
 	  }
 	}
       } // end if
@@ -190,7 +192,7 @@ function rrdRRAStackFlotObj(rrd_file,rra_idx,
     for (var i=0;i<rra_rows;i++) {
       var el=rra.getEl(i,ds_idx);
       if (el!=undefined) {
-	flot_series.push([timestamp*1000.0,el]);
+    flot_series.push([(timestamp+timestamp_shift)*1000.0,el]);
       }
       timestamp+=step;
     } // end for
diff --git a/root/tt/dashboard.tt b/root/tt/dashboard.tt
index 600d40c..89ef362 100644
--- a/root/tt/dashboard.tt
+++ b/root/tt/dashboard.tt
@@ -30,14 +30,15 @@
     <script type="text/javascript">
 
       function update_fname(rrd_data_arr, args) {
-        var graph_opts={};
-        var ds_graph_opts={};
-	if (rrd_data_arr.length == 1)
-          var f=new rrdFlot(args['plot_id'],rrd_data_arr[0],graph_opts,ds_graph_opts, args['si_suffix']);
-	else {
-	  var t = new RRDFileSum(rrd_data_arr, false);
-          var f=new rrdFlot(args['plot_id'],t,graph_opts,ds_graph_opts, args['si_suffix']);
-	}
+        var graph_opts = {};
+        var ds_graph_opts = {};
+        var tz_offset = [% tz_offset %];
+        if (rrd_data_arr.length == 1)
+          var f = new rrdFlot(args['plot_id'],rrd_data_arr[0],graph_opts,ds_graph_opts,args['si_suffix'],tz_offset);
+        else {
+          var t = new RRDFileSum(rrd_data_arr, false);
+          var f = new rrdFlot(args['plot_id'],t,graph_opts,ds_graph_opts,args['si_suffix'],tz_offset);
+        }
       }
 
       function update_fname_handler(bf, args) {
@@ -50,7 +51,7 @@
             alert("File "+fname+" is not a valid RRD archive!");
           }
           if (rrd_data!=undefined) {
-	    output.push(rrd_data);
+            output.push(rrd_data);
             if (output.length >= args['rrd_count']) {
               update_fname(output, args);
             }
@@ -58,7 +59,7 @@
       }
 
       function fname_update(fname, plot_id, si_suffix) {
-	var o = new Array();
+        var o = new Array();
         for (var i = 0; i < fname.length; i++) {
           try {
             FetchBinaryURLAsync(fname[i], update_fname_handler, {plot_id: plot_id,