The time change was introduced in France in 1975 to match the hours of activities with the hours of sunshine. It was thus limit the use of artificial lighting and make energy savings. While the countries of the European Union will lose an hour in the night from Saturday to Sunday by switching to summer time, 58% of French say they are still opposed to this measure and 66% say they do not believe in his impact in terms of energy savings, according to a BVA-Orange-iTELE survey.
“A disadvantage” for many French
According to a study by the Environment Agency and of Energy Management (ADEME) published in 2010, the time change, which critics point disturbances in biological rhythms and agricultural activities, has saved 440 GW / hour in 2009.