Greenwich Mean Time
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the time as measured at Greenwich, London, on the line of 0° longitude, used to calculate the time across the globe
- The flight schedule was based on Greenwich Mean Time.
- He adjusted his watch to Greenwich Mean Time for the international call.
- All time zones are calculated relative to Greenwich Mean Time.
- To convert local time to Greenwich Mean Time, subtract or add the appropriate hours.
- Scientists use Greenwich Mean Time to standardize observations across different locations.