Reminder: Summer time last night place for winter time
To 03.00 hours becomes 02.00 hours and goes in the winter time. That means an hour longer sleep.
By the clock for an hour to run on the standard time, the period of daylight better correspond to the period in which most people are awake. This allows the lighting later in the evening, and saves the citizen money.
In nearly seventy countries the clock twice a year. Within the European Union that on the last Sunday of March and on the last Sunday of October. With the beginning of the winter time we go back to the standard time.