Greek time is Greenwich Mean Time (GMT) plus two hours. To estimate the time back home, subtract 7 hours from the local time for New York and Washington, 8 hours for Chicago, 9 for Denver, and 10 for Los Angeles. Londoners subtract two hours. Those living in Sydney or Melbourne, add eight hours. Greek Daylight Saving Time starts on the last Sunday in March and ends the last Sunday in October. Stay alert—newspapers barely publicize the change.