Zweimal im Jahr verstellt Europa seine Uhren – im Frühjahr eine Stunde vor und im Herbst eine Stunde zurück. Während die einen diesen Wechsel begrüßen, leiden die anderen physisch und psychisch darunter. Sollte die Umstellung auf Sommerzeit bzw. Winterzeit also abgeschafft werden?
Studies show increases in car accidents, workplace injuries, suicides and even some miscarriages following daylight saving clock changes. Depression also increases. This is often referred to as seasonal affective disorder (SAD), where people feel low because of the sudden reduction of light. We commonly see spikes in sleep disorder referrals after the clock changes, with increased inquiries and consultations in the two months after. Sometimes, it can be manifested in other ways as well, according to other clinics — for example in a rise in mental‑health referrals. Research from Scandinavian countries has also shown an increase in cardiovascular problems, such as heart attacks, strokes and so on, following clock changes.
Daylight saving was introduced at a time when there was not a very comprehensive understanding of the relationship between sleep and health. The evidence suggests that we have completely underestimated how significant the problem can be, especially for those with pre-existing medical conditions. Even for the healthy population, there are risks. A study by Washington State University shows that changing to daylight saving time increases workplace injuries, and this can be caused by the reduction in sleep and the consequence of sleepiness. Reduced reaction times and the reduced concentration levels also tie in with the increase in car accidents. Some people can recover within a couple of weeks, but for some, it can take a couple of months.
Whether we change to a permanent GMT+1 or just GMT is not important, as long as we have a single time throughout the year, as the EU proposes. We’ve got to remember that we’re essentially built like cavemen, who slept when the sun went down, and woke up when the sun came up. It was a gradual change through the seasons, and our bodies adjusted naturally. Now, with the advent of artificial light and introducing these sudden time changes, problems arise.
If we do stick to one time, GMT+1 would be better because the extra bit of light that we’re going to experience is going to be so beneficial, particularly in sports and activities. It might not suit the far north of the country, of course. But to have a separate northern Scottish time zone wouldn’t be practical economically. We just have to make the best adjustment that we can.
The European Union covers a huge geographical area. It’s going to face severe pressure if it thinks it’s going to fix Finland in the north-east in the same place as Portugal in the south-west to a single time zone. What would that time zone be? And if not a single time zone, what’s the point of abolishing clock changes?
In winter, sunrise in my Scottish constituency is at around 9 a.m., sunset at 3.45 p.m. If we changed to GMT+1, Central European Time, all year round, those times would move to 10 a.m. sunrise and 4.45 p.m. sunset. People would leave to go to work in the darkness and then return home in the darkness. That sort of change would just be unacceptable and not just in Scotland. People in Finland, Portugal, Romania and Bulgaria would be complaining, as well. It might be okay for those in the centre — Belgium, Germany, the Netherlands — but that’s all. There will be a huge pushback across the EU against this proposal.
Clock changes are a function of winter coming, of seasonal changes because the earth tilts. So, we need it to happen, but the winter clock change lasts too long — it’s a five-month period. People live by their clocks. And they don’t like the winter clocks going back. Light has an effect on the way people act and behave. They are more active in the summer, when there’s more light. So, why not use the clock changes to shorten winter time, perhaps to a three-month period from the second week of November to the end of February? Certainly for the north-west of Scotland, that would be preferable.
For businesses and economically, it’s probably advantageous to synchronize clock changes across the EU. It’s better for planning flights and travel. The UK could end up exiting the EU but being forced to abolish clock changes instead of staying to discuss sensible proposals such as a shorter wintertime. We could see Northern Ireland and Ireland having different times, which happened in 1968–71, when GMT+1 was employed all year round in the UK. What was noticeable was that the road accident rate had been dropping, but it dropped less slowly during that period. Figures from the Royal Society for the Prevention of Accidents show that when they went back to clock changes, the accident rate started falling more rapidly again.