The world’s most accurate clock now belongs to researchers at the National Institute of Standards and Technology (NIST). Its new optical atomic clock, built around a single trapped aluminum ion, can ...

When do the clocks fall back for an extra hour of sleep? Here's when daylight saving time 2025 ends for the time change this ...

The sun is setting earlier and the nights are getting longer — a sign that clocks are about to fall back for the time change. Here's what to know about daylight saving time end 2025. Many countries ...

The world’s best clocks may be sensitive to an odd mix of quantum and relativistic effects that would stretch time and test the boundaries of physics ...