Since 1972, experts have added 27 seconds to Coordinated Universal Time to keep it aligned with Earth's rotation, but it has ...

Earth’s rotation subtly changes the length of the day. Now our clocks won’t change with it — at least not for a very long ...

Plans to retire it in 2035 are being expedited to prevent potential havoc on tech infrastructure. ...

In 2027, the world’s timekeepers will make a big change to help keep clocks and computer systems running smoothly. The International Bureau of Weights and Measures has decided to stop adding the “leap ...

Time has run out for the leap second, as scientists say the time-fixing practice must end to prevent a major global ...

Timekeepers add a leap second occasionally to keep our clocks and the Earth’s rotation in tune. That could now change.

You’re probably used to the month of February having an extra day every four years, during the leap year. Timekeepers added ...

As most everyone knows, there are typically 365 days in a year. The exception, of course, is leap year, which adds a bonus day to the month of February once every four years. If you've ever wondered ...