Why are the dates when we switch between summer and winter times (for example, swapping between Greenwich Mean Time and British Summer Time in the UK) placed so asymmetrically around the solstices?
• Hillary Shaw's response to this question says that, by using Greenwich Mean Time in winter, the UK is “minimising accidents caused by travelling in the dark” (16 December 2017). The evidence points the opposite way.
Between 1968 and 1971, there was a trial in which British Summer Time was maintained all year. Analysis of accident data showed an 11 per cent reduction in casualties during the…
