Time for the clocks to go back!

This Sunday you will need to change the time on all your clocks.

30-heure-hiverDon't forget to switch to winter time This Sunday, 29 October 2017, don't forget to put your clocks back by one hour. During the night of 28 to 29 October 2017, we will all get an extra hour's sleep!

On the last Sunday in October every year, summer time gives way to winter time on our clocks. At 3 a.m. it will actually be 2 a.m.; winter time lasts for five months.

The clocks are put back about a month after the autumn equinox, when there starts to be less than 12 hours of daylight each day. Since 1998, the whole of the European Union switches to winter time at the same time, for obvious practical reasons.

More than just a tradition

Changing the clock is traditional in the Grand Duchy. It dates back to the oil crisis in the early 1970s and the first wave of European decision-making on saving energy. The reason for changing the clocks, for both the winter and summer, is to make it possible to save electricity, as most people's times for getting up in the morning and going to bed at night are then more in line with natural daylight.

In the Grand Duchy, and in Europe generally, electricity consumption surges between 6 and 9 p.m. And although the tradition can sometimes be a little disconcerting, particularly for young children and the elderly, it's important to prepare for it, so that your body rhythm can adapt.

Finally, the extra hour of sleep when the clocks go back doesn't last for ever - we will lose it again when summer time starts. In 2018, that will be during the night of 25 to 26 March!


(Article written by the editorial team of the portal at

  • Updated 25-10-2017