world takes 1 day, or (approximately) 24 hours to complete one revolution. That, after all, is what a day is. It therefore follows, that if you divide the world into 24 equal zones, to correspond to each of the 24 hours in one day, there would be 24 equally-sized zones, each 15 degrees of longitude wide. However, there are precisely zero of these 'standard' zones. Not one single time zone is 15 degrees wide with uniform time from pole to pole. And, despite what may people will insist on telling you, there aren't just 24 of them, either. @asktwitqa
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