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How changing the clock is processed in SMARD data
On Sunday we change our clocks from daylight saving time to standard time. This is also reflected in a particular way in the time series.
Early Sunday in Germany, clocks will be changed from daylight saving time to standard time and Germany will then be back on Central European Standard Time.Every year on the last Sunday in October clocks are put back from 3am to 2am. The time change is also visible in the time series because all time data on SMARD refer to the Central European Time that is being observed when the data are recorded.
Example: 2022 actual consumption time series
Switch to winter time | |
30 October 2022, 1:00am-2:00am | 36,500 MWh |
30 October 2022, 2:00am-3:00am | 35,363 MWh |
30 October 2022, 2:00am-3:00am | 34,723 MWh |
30 October 2022, 3:00am-4:00am | 35,267 MWh |
This means that every year on the last Sunday in March when we switch from standard time to daylight saving time, the hour from 2:00am to 3:00am is skipped. Then, when we change from daylight saving time to standard time, the hour from 2:00am to 3:00am is repeated. This is the case when data categories are displayed in quarter hour resolution (eg actual electricity consumption) and also when they are displayed in hour resolution (eg wholesale prices).