Universal Time (UT), adopted in 1928 by the International Astronomical Union, is the time standard used in astronomical almanacs, referencing the 0° longitude meridian (Greenwich). For high precision, ...

As U.S. clocks shift forward this weekend, many earthlings will find themselves momentarily confused about what time it is. But scientists say a far larger temporal problem is looming on the horizon: ...

What time is it? A glimpse at your phone or computer will likely reveal a pretty accurate answer. But though time seems constant, we’ve actually been adjusting it for decades—in the form of a leap ...