The hidden politics of time: How clocks, calendars — and now-contentious time zones — came to be

It flies. It heals all wounds. It can be of the essence, and it can be money. We thrill in the best of it, lament the worst. We're warned not to waste it, since we can't turn it back — even as we try to make up for when it's lost.And probably more than anything when it comes to time, most of us try to manage it — in our everyday lives and on a global scale, from the biology of our circadian rhythms to what constitutes a work day. Clocks. Calendars. Pendulums. Hourglasses. Sundials. Time zones. For something that's been a pretty universal impulse to mark the shift of light and dark, the movement of the stars and the rhythms of the tides, the cycles of summer heat and winter cold, one might assume there's been a universal way of measuring time. That assumption would be wrong.Take the shiftin