How Do Clocks Keep Accurate Time Across the World?

Clocks work together like a team. Imagine you and your friend both have watches, but they’re not perfectly in sync. To fix that, someone checks the time on a super-accurate clock, called an atomic clock, and tells everyone else what time it is. This way, all clocks across the world can match up with each other.

Take the quiz →

Examples

  1. Your phone updates its clock from a nearby tower every day.
  2. A school in Japan stays in sync with one in New York using satellites.
  3. You can video chat with someone on the other side of the world without time differences.

Ask a question

See also

Discussion

Recent activity

Nothing here yet.