Featured Answer
EST and EDT are not the same — they are two versions of Eastern Time used at different times of year. EST (Eastern Standard Time) is UTC-5 and applies in winter. EDT (Eastern Daylight Time) is UTC-4 and applies in summer when Daylight Saving Time is in effect. The difference between them is exactly one hour. If you want a term that works year-round, use ET (Eastern Time).---
EST vs EDT: Side-by-Side Comparison
| EST | EDT | |
|---|---|---|
| Full name | Eastern Standard Time | Eastern Daylight Time |
| UTC offset | UTC-5 | UTC-4 |
| GMT offset | GMT-5 | GMT-4 |
| Season | Winter | Summer |
| Active period | Nov – Mar | Mar – Nov |
| DST in effect? | No | Yes |
| Example city | New York (winter) | New York (summer) |
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Is EST the Same as EDT?
No. They share the same geographic zone — the Eastern United States — but they are different offsets:- EST = UTC-5 — clocks are set to standard time, no DST adjustment
- EDT = UTC-4 — clocks have been moved forward 1 hour for Daylight Saving Time
The practical effect: when New York is on EDT, it is one hour later than when it is on EST. A meeting scheduled at "9 AM Eastern" means 9 AM EST in January and 9 AM EDT in July — the same clock time, but a different relationship to UTC and to other time zones.
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Is New York EST or EDT?
It depends on the time of year. New York (and the entire Eastern Time Zone) switches between EST and EDT twice a year:| Period | New York Time | UTC Offset |
|---|---|---|
| Jan 1 – Mar 7, 2026 | EST | UTC-5 |
| Mar 8 – Oct 31, 2026 | EDT | UTC-4 |
| Nov 1 – Dec 31, 2026 | EST | UTC-5 |
Major cities in the Eastern Time Zone include New York, Miami, Atlanta, Boston, Philadelphia, Washington DC, Detroit, and Charlotte.
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Is Eastern Time GMT-4 or GMT-5?
Both — depending on the season:- GMT-5 in winter (EST, November to March)
- GMT-4 in summer (EDT, March to November)
This is one of the most common sources of confusion when scheduling international calls. The gap between New York and London changes by one hour twice a year:
| Season | New York | London | Gap |
|---|---|---|---|
| Winter | EST (GMT-5) | GMT (UTC+0) | 5 hours |
| Summer | EDT (GMT-4) | BST (UTC+1) | 5 hours |
| Transition (US switched, UK hasn't yet) | EDT (GMT-4) | GMT (UTC+0) | 4 hours |
| Transition (UK switched, US hasn't yet) | EST (GMT-5) | BST (UTC+1) | 6 hours |
During the 1–2 week windows when the US and UK switch DST on different dates, the gap temporarily shifts to 4 or 6 hours.
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When Does EDT Start?
EDT starts on the second Sunday of March at 2:00 AM, when clocks spring forward one hour to 3:00 AM. EDT ends on the first Sunday of November at 2:00 AM, when clocks fall back one hour to 1:00 AM.EDT Dates 2024–2028
| Year | EDT Starts | EDT Ends |
|---|---|---|
| 2024 | March 10 | November 3 |
| 2025 | March 9 | November 2 |
| 2026 | March 8 | November 1 |
| 2027 | March 14 | November 7 |
| 2028 | March 12 | November 5 |
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The Memory Trick
"Spring forward, fall back"- Spring (March): Clocks move forward 1 hour → EST becomes EDT → you lose 1 hour of sleep
- Fall (November): Clocks move back 1 hour → EDT becomes EST → you gain 1 hour of sleep
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EST vs EDT vs ET: Which Should You Use?
| Term | When to Use | Example |
|---|---|---|
| EST | Specifically winter (Nov–Mar) | "Deadline is Jan 15 at 5 PM EST" |
| EDT | Specifically summer (Mar–Nov) | "Webinar is July 10 at 2 PM EDT" |
| ET | Any time — always safe | "The show airs at 8 PM ET" |
Using EST in summer or EDT in winter is technically incorrect. When in doubt, ET is always right.
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How EST and EDT Affect Scheduling
With the US West Coast
The gap between Eastern and Pacific Time is always 3 hours, regardless of EST or EDT — both coasts switch DST on the same dates.
With Europe
The gap between Eastern Time and Central European Time (CET/CEST) is usually 6 hours but can temporarily shift to 5 or 7 hours during the 1–2 week DST transition windows when the US and Europe switch on different dates.
With Asia and India
India (IST, UTC+5:30) does not observe DST. The gap with Eastern Time is:
- 10.5 hours when New York is on EST (winter)
- 9.5 hours when New York is on EDT (summer)
Japan (JST, UTC+9) does not observe DST either:
- 14 hours ahead of EST (winter)
- 13 hours ahead of EDT (summer)
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Quick Reference: EST and EDT Offsets
| Comparison | EST (Winter) | EDT (Summer) |
|---|---|---|
| vs UTC | UTC-5 | UTC-4 |
| vs GMT | GMT-5 | GMT-4 |
| vs PST/PDT | +3 hours | +3 hours |
| vs CST/CDT | +1 hour | +1 hour |
| vs MST/MDT | +2 hours | +2 hours |
| vs GMT/BST (London) | -5 hours | -5 hours* |
| vs CET/CEST (Paris) | -6 hours | -6 hours* |
| vs IST (India) | -10.5 hours | -9.5 hours |
| vs JST (Japan) | -14 hours | -13 hours |
*Except during DST transition weeks when US and Europe switch on different dates.
