Convert Eastern Daylight Time to Greenwich Mean Time (EDT to GMT)

Understanding EDT and GMT Time Zones

Eastern Daylight Time (EDT)

Eastern Daylight Time is observed in undefined and uses the offset UTC-4. Major cities in this time zone include New York, Washington DC, Miami, Atlanta, Boston. This time zone serves a significant global region with important economic and cultural hubs.

Greenwich Mean Time (GMT)

Greenwich Mean Time operates at UTC+0, covering undefined. Key cities include London, Dublin, Lisbon. The 4-hour forward offset from EDT means that when professionals in New York start their workday at 9:00 AM, it is already 1:00 PM in London.

EDT is also commonly referred to as Eastern Daylight, Eastern Time, ET, East Coast time, New York time. GMT is also known as London time, UK time, British time, England time. So if you are searching for Eastern Daylight to London time, this is the same conversion as EDT to GMT.

Complete EDT to GMT Conversion Table

The table below shows every two-hour increment converted from Eastern Daylight Time to Greenwich Mean Time. Business hours (9 AM – 5 PM) are highlighted for easy scheduling reference.

Times shown in 12-hour and 24-hour format. Last updated 2026-03-09.

Scheduling Between EDT and GMT

Remote teams spanning New York and London often adopt asynchronous practices to bridge the 4-hour gap. Tools like Slack, Loom, and Notion reduce the need for real-time overlap while keeping projects moving forward.

The moderate 4-hour gap between EDT and GMT means that there is a partial overlap of business hours. Teams can typically find a 3–4 hour window that works for both sides without requiring anyone to work outside normal hours.

Travel Between New York and London

When arriving in London from New York, immediately set all devices to local time. Exposure to natural daylight at the destination helps reset your circadian rhythm. Eastbound travelers should seek morning light.

Medical experts recommend allowing approximately one day of adjustment per hour of time difference. For the 4-hour shift between EDT and GMT, plan for about 4 days to fully acclimate.

Daylight Saving Time Considerations

Keep in mind that DST transition dates differ between regions. The US changes clocks in March and November, Europe in March and October, and Australia in April and October. This can cause temporary shifts in conversion results.

For the EDT to GMT conversion specifically: EDT (UTC-4) and GMT (UTC+0) both observe DST. When both zones transition on different dates, the offset temporarily shifts by one hour for a few weeks. Always verify during March–April and October–November.

Related Time Zone Conversions

References & Resources

• TimeAndDate.com — World Time Zones
• NIST — Official US Time Standard
• IANA Time Zone Database
• Wikipedia — Time Zone Abbreviations
• WorldTimeServer — Current Times Worldwide
• Royal Observatory Greenwich

Frequently Asked Questions