or UTC (an agreed-upon system for keeping time using data from atomic clocks around the world, known as a time scale). National measurement labs such as NIST produce and distribute versions of UTC ...

real-world nuclear clock. Even with these advances, big hurdles remain. One of the toughest problems is stability. In solid-state systems like crystals or thin films, the environment around the ...

The readings from atomic clocks around the world can be averaged for a broad but accurate as possible sense of time for planet Earth as a whole, giving us Coordinated Universal Time, or UTC.

Networks of atomic clocks around the planet then sync their systems ... UV frequency to the optical frequency of another of the world’s most accurate strontium-based atomic clocks to establish ...

Brazil and the Caribbean have remained holdouts and still adjust their clocks. But plenty of places around the world have opted out of it entirely. These include all of Asia, and most of Africa.