When does daylight saving time end and how do I adapt?

Only about a third of countries practice the biannual time shift that is daylight saving time, most of them in Europe and North America. Photograph: J Studios/Getty Images

Call me an idealist, but I like to imagine someday my grandchildren will be baffled when I tell them about daylight saving time, and how the clock used to change twice a year. “That’s so wild, Grandma,” they’ll say before switching on their AI neural implants, or whatever other technological horrors will exist by then.

Daylight saving time (DST) was first established in Germany during the first world war as an energy-saving measure – more hours of daylight in the evening meant less coal was needed for fires. Other countries including the UK and the US soon followed suit.