From daylight saving to calendars, here’s how our ways of measuring time 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…