UTC vs GMT: What’s the Difference?
Learn the key differences between UTC and GMT, how each works, and which one is used as the global standard for time today.
TIME ZONES
Rachel
4/7/20261 min read
UTC vs GMT
Many people believe UTC and GMT are exactly the same, but there are important differences.
GMT
Greenwich Mean Time is based on the Earth’s rotation and the position of the sun over Greenwich, England.
UTC
Coordinated Universal Time is based on atomic clocks, making it far more precise.
Key Differences
Despite these differences, many countries still use GMT terminology when referring to their time zone.
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