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DST is scheme adopted in many countries and territories where time is advanced – usually by an hour - during the summer months.
DST is sometimes referred to as Summer Time; when DST is not observed, it is referred to as Standard Time, Winter Time or Normal Time.
This explanation uses GMT, (Greenwich Mean Time) and BST (British Summer Time) as an example; however, the same effects occur with any DST scheme. To show operation with DST schemes outside the United Kingdom, simply adjust the dates and times to those used by your local DST System.
All parameter data records stored in EMS, Notion and Hanwell IceSpy, are stored using GMT, and converted to local time for display on graphs, reports and live view etc.
At 01:00hours on the last Sunday of March, the time changes from 01:00 GMT to 02:00 BST
•As a result, specific data cannot be shown for the period 01:00 to 02:00, because this time does not exist.
At 02:00hours on the last Sunday of October, the time changes from 02:00 BST to 01:00 GMT
•As a result, the period 01:00 to 02:00 occurs twice, and double points of data are shown; this presents slightly rough looking data for the time change period, but maintains data integrity and ensures that any excursions are shown.