The Trending control supports Daylight Saving Time (DST). When the trend displays a time period covering the change over to DST, i.e. the time is moved forward by one hour, the missed hour will not be displayed on the graph.
For example, in the UK the time at which DST comes into effect is 02:00, which becomes 03:00. No 02:00 will be displayed on the graph. When the trend displays a time period covering the change over from DST, i.e. the time is moved backward by one hour, the additional hour will be displayed on the graph. In this case the time at which DST ceases is 02:00, therefore 02:00 will appear on the graph twice.
If a trend request starts at 02:00 on the day that DST ceases the first of the two 02:00 hours will always be selected. The display can be advanced by one hour to view data for the second 02:00.