But the very worst thing about DST is that it’s bad for your health. According to Stanley Coren, a sleep expert at the University of British Columbia, the number of traffic accidents and fatal industrial mishaps increase on the Monday after we spring forward. (Check out one of his studies here.) The reason, presumably, is because losing even a single hour of sleep over the weekend makes a lot of people a bit drowsier on what we might usefully call Black Monday. Unfortunately, there’s no compensating effect of a super-safe Monday as we go off DST and “fall back” in the autumn.