https://www.newscientist.com/article/2125794-changing-clocks-twice-a-year-is-bad-for-health-and-energy-use/ > There’s little doubt that British Summer Time (BST) brings benefits, including reducing energy usage nationwide by allowing us to make better use of daylight hours. This has led to repeated calls for BST to last all year round, to cut carbon emissions and let us enjoy more of the country’s limited winter afternoon sunshine. > The act of switching to daylight savings every year also seems to harm some people’s health. Studies have found an annual spike in heart attacks in Michigan in the US and strokes in Finland the day after the clocks go forward in spring. Many of these deaths are likely to have been in frail, elderly people who are at the mercy of care staff schedules. But some could be due to loss of sleep: there’s evidence that heart attacks are most common on Mondays, possibly due to sleep lost while readjusting to the schedule of the working week.