The return of global travel sparks an examination of international time zones. You might know about GMT and UTC, but it might surprise you to learn that the matter is far from settled
In the world of physics, there are only two sorts of time, the relativistic sort that makes up one part of the fourth dimension, as described by Einstein, and the arow of time that moves in the direction of entropy. In the world of technology, commerce, health, culture and politics there are multiple times – and, it seems, often a complete lack of logic to underpin them.
Since this magazine is about wristwatches and timekeeping, broadly speaking, none of you, dear readers, will be surprised by a connection between timekeeping and longitude. Some of you will even recall that a 15 degree shift in any direction corresponds to a one-hour difference in local time. This idea first took hold for the editors in the physicist and watchmaker Ludwig Oeschlin’s observation that you can watch the earth turn on its axis by looking at the movement of the hands on your dial.
And then there is daylight savings time – not all countries embrace this yearning for more evening light, and of those that do, not all embrace it at the same time. Or there is the fact that time zones do not even operate in whole hours. India and its neighbour Nepal, for example, are just 15 minutes apart.
“Time zones are a function of distance, of moving slowly between one point and another,” explains Hanke. “But we argue that with the rapid movement of people and communications, local time zones became obsolete. We once had hundreds of thousands of time zones around the world, and then we had 38. Our proposal is simply to go from 38 to one, and for the same logical reason. This is a small world.
As Akkermans puts it, “we tend to think about time zones as being about east and west, but they can also have influence north to south. And then, because of the impact on daylight, that’s when time zones become really important.”best flexibility for adaptation to standardised time, as the Tissot PRXIt is human biology that we wake or sleep according to our circadian rhythms, which in turn are managed by our exposure to daylight; that is, the rising and setting of the sun.
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