Scientists have invented a new clock that keeps time more precisely than any that have come before. The clock is so accurate that it won’t gain or lose more than one second in 14 billion years — ...

A new atomic clock is one of the world’s best timekeepers, researchers say — and after years of development, the “fountain”-style clock is now in use helping keep official U.S. time. Known as NIST-F4, ...

Your Android device might soon tell you exactly how much your clock has moved while traveling to a new time zone.

Physicists have demonstrated all the ingredients of a nuclear clock — a device that keeps time by measuring tiny energy shifts inside an atomic nucleus. Such clocks could lead to vast improvements in ...

Everyone in the UK faces the annual ritual of changing the clocks in the early hours of tomorrow morning as we say goodbye to British Summer Time. From Sunday, we will be back on Greenwich Mean Time.