Time Greek time is 2 hours ahead of Greenwich Mean Time, 1 hour ahead of Central European Time, and 7 hours ahead of Eastern Standard Time. Along with the rest of continental Europe, clocks are put forward 1 hour during summer (from the end of March to the end of September), almost a month earlier than the UK, the US and Canada. Please note that time difference between these countries is 1 hour greater for some weeks in April and in October. Dial 14814 for the exact time in Greece.