Do not convert timestamp to local timezone for graphs.

apachedex/__init__.py

@@ -117,7 +117,7 @@ def prepareDataForGraph(daily_data, date_format, placeholder_delta):
   return new_daily_data
 
 def graphPair(daily_data, date_format, graph_period):
-  date_list = [int(time.mktime(time.strptime(x[0], date_format)) * 1000)
+  date_list = [int(calendar.timegm(time.strptime(x[0], date_format)) * 1000)
     for x in daily_data]
   timeformat = '%Y/<br/>%m/%d<br/> %H:%M'
   # There is room for about 10 labels on the X axis.