A meeting invite that says "10:00 IST" looks precise. It isn't. IST is India Standard Time (UTC+05:30), Irish Standard Time (UTC+01:00) and Israel Standard Time (UTC+02:00). In July, the first two are four and a half hours apart. CST can mean Chicago or Shanghai, 14

Nevada runs on Pacific Time. Utah runs on Mountain Time. The two states share a long, mostly straight desert border, yet anyone driving east from Ely, Nevada, toward Delta, Utah, loses an hour the moment they cross the line. This is not an accident of

Brazil covers 8,514,877 square kilometers, the fifth largest country on Earth, and its territory stretches 4,319 kilometers from its Atlantic tip near João Pessoa to the Peruvian border, a span of roughly 39 degrees of longitude. Despite that scale, Brazil runs on only four time

For most of the 20th century, Kiribati wasn't ahead of anyone. Parts of it were among the last places on Earth to see each new day, not the first. That changed in 1995 through a single, deliberate act of redrawing the map, and the country

The average worker in Mexico puts in about 2,200 hours a year. The average worker in Germany puts in about 1,340. The gap of roughly 860 hours equals more than 21 standard 40-hour weeks, close to five extra months of full-time work. Most "who works

The 40-hour week looks like a natural unit of work, but the number was never derived from a measurement of how much work is best. It is the product of two separate fights: one over the length of the day, which ended at eight hours,

The average American age 15 and over logs about 9 hours of sleep a day, spends just over 5 hours on leisure and works 3 hours. That last number looks wrong until you see how it is built, and nearly every headline figure from the

The most famous number in time management started as a workaround. In the late 1980s Francesco Cirillo, a university student who could not make himself study, used a tomato-shaped kitchen timer to test a small question: could he work for two minutes without interruption? Twenty-five