EDT to GMT
+4hEDT
EDTSOURCEGMT
GMTGreen rows indicate typical business hours (9 AM - 5 PM)
EDT and GMT on the World Map
The map below highlights the EDT (Eastern Daylight Time) and GMT (Greenwich Mean Time) timezone regions across the globe.
EDT – Eastern Daylight Time
UTC-04:00Eastern Daylight Time (EDT) is the daylight saving time observed in the Eastern Time Zone, 4 hours behind UTC.
- •EDT is observed from the second Sunday of March to the first Sunday of November.
- •During EDT, the US East Coast is only 4 hours behind London (instead of 5).
- •Not all EST locations switch to EDT – Panama and Jamaica stay on EST year-round.
GMT – Greenwich Mean Time
UTC+00:00Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.
- •GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
- •The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
- •GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
- •Iceland uses GMT year-round and never observes daylight saving time.
- •The UK switches from GMT to BST (British Summer Time) in late March each year.
Everything You Need to Know About EDT and GMT Time
EDT runs on Eastern Daylight Time (EDT) at UTC-04:00. GMT runs on Greenwich Mean Time (GMT) at UTC+00:00. That puts EDT 4 hours ahead of GMT — a difference of +4h at the current offsets.
In practice, when it is 9:00 AM in EDT it is 1:00 PM in GMT. Midnight in EDT is 4:00 AM in GMT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
EDT to GMT time conversion table
| EDT (EDT) | GMT (GMT) | Day |
|---|---|---|
| 12:00 AM | 4:00 AM | same day |
| 6:00 AM | 10:00 AM | same day |
| 7:00 AM | 11:00 AM | same day |
| 8:00 AM | 12:00 PM | same day |
| 9:00 AM | 1:00 PM | same day |
| 12:00 PM | 4:00 PM | same day |
| 3:00 PM | 7:00 PM | same day |
| 5:00 PM | 9:00 PM | same day |
| 6:00 PM | 10:00 PM | same day |
| 9:00 PM | 1:00 AM | next day |
Why people convert EDT to GMT time
- Scheduling a call from EDT to GMT: a 10:00 AM start in EDT lands at 2:00 PM in GMT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both EDT and GMT are inside the 9-to-5 working day between 9:00 AM and 1:00 PM EDT time (1:00 PM–5:00 PM GMT). That is roughly 4 hours of usable overlap.
- Watching a live event or market open: EDT viewers need 1:00 PM in GMT to catch a 9:00 AM start there, and 8:00 PM if the event is anchored to EDT.
- Always state the zone abbreviation, not just the hour. "3:00 PM EDT" is unambiguous; "3 PM" across a +4h gap is not.
- Block 9:00 AM–1:00 PM EDT as the recurring meeting window if you work primarily from EDT and need GMT colleagues present.
About EDT (Eastern Daylight Time)
Eastern Daylight Time (EDT) is used during the summer months (second Sunday of March to the first Sunday of November) in the Eastern Time Zone. During EDT, clocks are advanced by one hour to take advantage of longer daylight hours. Not all locations in the Eastern Time Zone observe DST – Panama, Jamaica, and most of the Caribbean remain on EST year-round.
About GMT (Greenwich Mean Time)
Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.
Best time to call between EDT and GMT
Both EDT and GMT sit inside the 9 AM – 5 PM working day between 9:00 AM–1:00 PM EDT, which is 1:00 PM–5:00 PM GMT. That gives roughly 4 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
EDT and GMT overlap for about 4 hours during the working day — enough for meetings if you avoid the edges of the window.
EDT is 4 hours ahead of GMT (EDT UTC-04:00 → GMT UTC+00:00). The shared working window is 9:00 AM–1:00 PM EDT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
EDT
☀ Currently in DST
Standard: UTC-05:00 · DST: UTC-04:00
Clocks fall back on Sun, Nov 1, 2026
GMT
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between EDT and GMT?
EDT (EDT, UTC-04:00) is 4 hours ahead of GMT (GMT, UTC+00:00). The gap is currently +4h.
How do I convert EDT time to GMT time?
Add +4h to EDT local time. For example, 9:00 AM in EDT is 1:00 PM in GMT.
What time is it in GMT right now?
GMT uses GMT at UTC+00:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +4h offset from EDT.
What is the best time to call GMT from EDT?
Call between 9:00 AM and 1:00 PM EDT — that maps to 1:00 PM–5:00 PM GMT and keeps both parties inside the working day.
Which is ahead, EDT or GMT?
EDT is 4 hours ahead of GMT. When it is 12:00 PM in EDT it is 4:00 PM in GMT.
Does daylight saving time affect the EDT–GMT difference?
Neither zone observes daylight saving time, so the +4h offset between EDT and GMT is fixed all year.
Which other cities share EDT's time zone?
EDT also covers New York City, Washington D.C., Toronto, Miami, Philadelphia, Atlanta, Boston, Montreal.
Which countries use EDT, EDT's zone?
EDT is used in United States (Eastern), Canada (Ontario, Quebec), Bahamas, Haiti, Turks and Caicos.
Is there a day difference between EDT and GMT?
Not normally. The +4h gap only pushes the date over for late-evening times.
What is the time difference between EDT and GMT?
GMT is +4h from EDT.
What timezone is EDT in?
EDT operates on its local timezone.
What timezone is GMT in?
GMT operates on its local timezone.
Which countries use EDT (Eastern Daylight Time)?
EDT is used in United States (Eastern), Canada (Ontario, Quebec), Bahamas, Haiti, Turks and Caicos.
Does EDT observe daylight saving time?
Yes, EDT switches to EST during summer months.
What are some interesting facts about EDT?
EDT is observed from the second Sunday of March to the first Sunday of November. During EDT, the US East Coast is only 4 hours behind London (instead of 5).
Which cities are in the GMT timezone?
Major cities in the GMT timezone include London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar.
What is the UTC offset for GMT?
Greenwich Mean Time (GMT) is at UTC+00:00. During daylight saving time, it shifts to BST.
What should I know about the GMT timezone?
GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
When is it midnight in EDT, what time is it in GMT?
When it is 12:00 AM (midnight) in EDT (EDT), it is +4h later in GMT (GMT).
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