In an interview with the German newspaper Tagesspiegel, Prof. Henrik Oster, Director of the Institute of Neurobiology at the University of Lübeck, explains why the transition to daylight saving time in spring is particularly disruptive to our biological rhythms. He discusses potential health risks, the importance of daylight and sleep, and the benefits of adopting permanent standard time. He also highlights why individual chronotypes should be better considered in school and work schedules.