Difference Wiki

EDT vs. GMT: What's the Difference?

Edited by Sumera Saeed || By Sawaira Riaz || Published on January 20, 2024
EDT (Eastern Daylight Time) is a time zone observed in parts of North America, offset by -4 hours from GMT (Greenwich Mean Time), a standard time against which others are set.

Key Differences

EDT, standing for Eastern Daylight Time, is the time zone observed during daylight saving time in the Eastern part of North America. GMT, or Greenwich Mean Time, is a time standard that originally referred to mean solar time at the Royal Observatory in Greenwich, London.
Sawaira Riaz
Jan 20, 2024
EDT is used during the warmer months (spring to fall) and is 4 hours behind GMT. GMT is not subject to seasonal changes and remains constant throughout the year, serving as a reference time worldwide.
Sawaira Riaz
Jan 20, 2024
Regions observing EDT switch to Eastern Standard Time (EST), which is 5 hours behind GMT, during the colder months when daylight saving time is not in effect. GMT, in contrast, does not change and has no daylight saving variation.
Sawaira Riaz
Jan 20, 2024
EDT aligns with areas like New York City and Toronto, affecting local activities and business hours. GMT is a global time standard, used as the basis for time zones worldwide and important for international coordination.
Sumera Saeed
Jan 20, 2024
For global communication and travel, understanding the difference between EDT and GMT is crucial, especially for those dealing with regions observing daylight saving time. GMT serves as a fixed point of reference for calculating time differences globally.
Sawaira Riaz
Jan 20, 2024
ADVERTISEMENT

Comparison Chart

Time Zone Offset

UTC -4 hours during daylight saving time
UTC +0 hours, no daylight saving adjustment
Sawaira Riaz
Jan 20, 2024

Observance

Eastern parts of North America
Global standard time
Sumera Saeed
Jan 20, 2024

Daylight Saving Time

Observed, shifts from EST
Not observed, remains constant
Sawaira Riaz
Jan 20, 2024

Representative Location

New York City, Toronto
Greenwich, London
Sawaira Riaz
Jan 20, 2024

Role in Global Coordination

Regional time zone, changes seasonally
Fixed reference for world time zones
Aimie Carlson
Jan 20, 2024
ADVERTISEMENT

EDT and GMT Definitions

EDT

Four hours behind GMT.
When it's noon GMT, it's 8 AM EDT.
Sawaira Riaz
Dec 22, 2023

GMT

A time standard used globally.
GMT is used as a reference time worldwide.
Sawaira Riaz
Dec 22, 2023

EDT

Time zone used in Eastern North America during daylight saving time.
The meeting is scheduled for 10 AM EDT.
Sawaira Riaz
Dec 22, 2023

GMT

Basis for time zones worldwide.
Local times are often expressed as offsets from GMT.
Sawaira Riaz
Dec 22, 2023

EDT

Affects local business hours in its region.
The store opens at 9 AM EDT.
Sawaira Riaz
Dec 22, 2023

GMT

Not subject to daylight saving time.
GMT remains constant throughout the year.
Sumera Saeed
Dec 22, 2023

EDT

Important for timing in areas like New York.
The New York stock exchange operates on EDT.
Aimie Carlson
Dec 22, 2023

GMT

Integral for international time coordination.
Flight schedules are often coordinated using GMT.
Aimie Carlson
Dec 22, 2023

EDT

Switches to EST in winter.
In November, we'll change from EDT to EST.
Sawaira Riaz
Dec 22, 2023

GMT

Originally based on solar time at Greenwich.
GMT was established at the Royal Observatory in Greenwich.
Sawaira Riaz
Dec 22, 2023

GMT

The local time at the 0 meridian passing through Greenwich, England; it is the same everywhere
Sawaira Riaz
Dec 20, 2023

FAQs

Is GMT affected by seasons?

No, it's the same all year round.
Sawaira Riaz
Jan 20, 2024

When is EDT used?

During daylight saving time in parts of North America.
Sawaira Riaz
Jan 20, 2024

What does EDT stand for?

Eastern Daylight Time.
Sawaira Riaz
Jan 20, 2024

What happens to EDT in winter?

It changes to Eastern Standard Time (EST).
Aimie Carlson
Jan 20, 2024

Which major cities use EDT?

Cities like New York and Toronto.
Sawaira Riaz
Jan 20, 2024

What is GMT?

Greenwich Mean Time, a global time standard.
Sumera Saeed
Jan 20, 2024

How far is EDT behind GMT?

4 hours during daylight saving time.
Sawaira Riaz
Jan 20, 2024

When does EDT start each year?

Typically in March.
Harlon Moss
Jan 20, 2024

Does GMT observe daylight saving?

No, it does not.
Janet White
Jan 20, 2024

Does EDT affect the whole of North America?

Only the Eastern part.
Aimie Carlson
Jan 20, 2024

Can GMT be used as a local time zone?

It can be, particularly near the Greenwich meridian.
Aimie Carlson
Jan 20, 2024

What's the role of GMT in aviation?

It's used for flight schedules and air traffic control.
Aimie Carlson
Jan 20, 2024

How does daylight saving time affect EDT?

EDT is the daylight saving time observation for the Eastern Time Zone.
Janet White
Jan 20, 2024

Is GMT used for international events?

Yes, it's often used for global coordination.
Janet White
Jan 20, 2024

What's the difference between GMT and UTC?

They're functionally the same; UTC is more precise.
Janet White
Jan 20, 2024

Why is GMT important?

It's a reference point for time zones worldwide.
Harlon Moss
Jan 20, 2024

Who uses GMT?

It's used internationally for various purposes.
Sawaira Riaz
Jan 20, 2024

Does EDT apply to all of the Eastern US?

Most, but not all areas.
Sawaira Riaz
Jan 20, 2024

How is GMT determined?

Originally, it was based on mean solar time at Greenwich.
Sawaira Riaz
Jan 20, 2024

Are EDT and GMT always 4 hours apart?

Only during North America's daylight saving time.
Harlon Moss
Jan 20, 2024
About Author
Written by
Sawaira Riaz
Sawaira is a dedicated content editor at difference.wiki, where she meticulously refines articles to ensure clarity and accuracy. With a keen eye for detail, she upholds the site's commitment to delivering insightful and precise content.
Edited by
Sumera Saeed
Sumera is an experienced content writer and editor with a niche in comparative analysis. At Diffeence Wiki, she crafts clear and unbiased comparisons to guide readers in making informed decisions. With a dedication to thorough research and quality, Sumera's work stands out in the digital realm. Off the clock, she enjoys reading and exploring diverse cultures.

Trending Comparisons

Popular Comparisons

New Comparisons