EST vs EDT — What's the Difference?

4 min read

You have probably seen meeting invites that say "3 PM EST" in the middle of July. Technically, that is wrong -- in July, the eastern United States is on EDT, not EST. The difference is exactly one hour, and mixing them up can mean showing up 60 minutes early or late. Here is what you need to know.

EST and EDT at a Glance

  • EST (Eastern Standard Time): UTC-5. Used from November to March.
  • EDT (Eastern Daylight Time): UTC-4. Used from March to November.
  • ET (Eastern Time): The umbrella term that covers both. Using "ET" is the safest choice when you do not know or do not want to specify which one is active.

What is EST (Eastern Standard Time)?

Eastern Standard Time is the "default" time for the eastern United States and Canada. Its UTC offset is -5 hours, meaning when it is 12:00 noon UTC, it is 7:00 AM in New York.

EST is active during the colder months -- roughly from the first Sunday of November through the second Sunday of March. During this period, clocks are at their "standard" position, unchanged by daylight saving time.

What is EDT (Eastern Daylight Time)?

Eastern Daylight Time kicks in when clocks "spring forward" by one hour. Its UTC offset is -4 hours -- one hour ahead of EST. When it is 12:00 noon UTC, it is 8:00 AM EDT.

EDT is active during the warmer months -- from the second Sunday of March through the first Sunday of November. This is actually the longer period: EDT is in effect for roughly 8 months of the year, while EST covers only about 4 months.

When Does Each Apply?

In 2026, the transitions are:

  • March 8, 2026, 2:00 AM: Clocks spring forward to 3:00 AM. EST ends, EDT begins.
  • November 1, 2026, 2:00 AM: Clocks fall back to 1:00 AM. EDT ends, EST begins.

A simple rule of thumb: if the month is April through October, you are on EDT. If it is December through February, you are on EST. March and November are the transition months where it depends on the exact date.

Which Cities and States Use ET?

The Eastern Time zone covers a large swath of North America:

  • Major US cities: New York, Washington D.C., Miami, Atlanta, Boston, Philadelphia, Detroit, Charlotte
  • US states: All of Connecticut, Delaware, Georgia, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, South Carolina, Vermont, Virginia, West Virginia, and the District of Columbia. Parts of Florida, Indiana, Kentucky, Michigan, and Tennessee are also in ET.
  • Canadian provinces: Ontario (including Toronto and Ottawa), Quebec (including Montreal), and parts of Nunavut.
  • Caribbean: Haiti, Jamaica, Cuba, Bahamas, Turks and Caicos (some of these may not observe DST).

Common Mistakes to Avoid

  • Saying "EST" year-round. This is the single most common error. If it is June and you say "the meeting is at 2 PM EST," you technically mean 2 PM UTC-5, which is actually 3 PM on the clock in New York (since New York is on EDT/UTC-4 in June). Use "ET" if you want to be safe.
  • Forgetting the hour difference. When converting to another timezone, using EST (UTC-5) instead of EDT (UTC-4) throws your calculation off by a full hour. Our timezone converter picks the correct offset automatically based on the date.
  • Assuming everyone observes DST. Parts of Indiana did not observe DST until 2006. Some Caribbean countries in the ET zone never change clocks. Always verify for specific locations using our world clock.

Frequently Asked Questions

Is New York EST or EDT right now?

It depends on the date. From the second Sunday in March through the first Sunday in November, New York uses EDT (UTC-4). The rest of the year, it uses EST (UTC-5). Check our New York live clock for the current status.

What does "ET" mean?

ET stands for Eastern Time and is the generic term that encompasses both EST and EDT. When someone says "3 PM ET," they mean 3 PM on the clock in the Eastern time zone, regardless of whether DST is active. This is the safest abbreviation to use in meeting invites and schedules.

Is EST the same as UTC-5?

Yes. EST is always UTC-5. EDT is always UTC-4. The Eastern Time zone switches between these two offsets depending on whether daylight saving time is in effect. UTC itself never changes.