With the threat of “negative leap seconds” looming in the distance, official timekeepers are wondering if a leap hour might ...

International timekeeping authorities are preparing to vote on a proposal to make the leap second—an extra second that is occasionally added to the year to keep Universal Coordinated Time in tune ...

The transition from June to July will be delayed by circumstances beyond everyone's control. Time will stand still for one second on Saturday evening (June 30) because a "leap second" will be added to ...

What can happen in a second? Apparently a lot. The world is cautiously preparing for something taking place Tuesday called a "leap second." Even though it'll happen in the blink of an eye, there are ...

To align Universal Coordinated Time with the Earth’s rotation, a second occasionally gets added to the year. That may change in 2027 ...