This weekend may be one of the last time changes. On the night of 30 to 31 October, the clocks will have to be set back one hour.

That's right, in October we switch back to winter time: at 3am, clocks go back an hour. From Sunday onwards, early risers will have more daylight, but it will get dark earlier.

But how long will this system last, considering it is detrimental to biological rhythms and not necessarily cost-effective? The European institutions were supposed to end the system in 2019 - and then in 2021 - but they are playing for time because they cannot agree on a time slot.

One of the complicated issues to be resolved is to encourage countries to align their choice of legal time (summer or winter) in order to avoid creating a patchwork of time zones between neighbours.

Because of the large daily flow of border workers, Luxembourg must synchronise with Germany, Belgium and France - not to mention the Netherlands, within the Benelux. This is anything but an easy task at a time when current events (Covid, Brexit, and so on) have been occupying European politicians for many months.