EST vs EDT: What's the Difference?
EST and EDT are both used in the US Eastern timezone. Learn when each applies, the UTC offsets, and why the switch happens.
Quick Answer
- EST (Eastern Standard Time) = UTC−05:00 — used November to March
- EDT (Eastern Daylight Time) = UTC−04:00 — used March to November
The 1-hour difference accounts for daylight saving time (DST). When clocks “spring forward,” EST becomes EDT.
When Does EST Switch to EDT?
| Event | Timing |
|---|---|
| EST → EDT | Second Sunday of March at 2:00 AM |
| EDT → EST | First Sunday of November at 2:00 AM |
During EDT, clocks move forward 1 hour, gaining an extra hour of evening daylight.
Who Uses EST/EDT?
Eastern Time is used by approximately 50% of the US population, including:
- New York, New York
- Washington, D.C.
- Miami, Florida
- Atlanta, Georgia
- Toronto, Canada
- Montreal, Canada
- Havana, Cuba (observe their own DST schedule)
EST vs EDT in Practice
If you’re scheduling a meeting and someone says “3 PM Eastern,” you need to know which offset applies:
| Month | Timezone | UTC Offset | 3 PM Eastern = |
|---|---|---|---|
| January | EST | -05:00 | 8 PM UTC |
| July | EDT | -04:00 | 7 PM UTC |
That 1-hour difference can mean missing a meeting if you’re converting manually.
Should I Say “EST” or “ET”?
If you don’t want to worry about whether EST or EDT applies, use ET (Eastern Time). It automatically refers to whichever is currently in effect.
Most calendar apps and scheduling tools use “ET” for this reason.
Convert Eastern Time Now
Use our EST to PST converter or EST to GMT converter to see the current time difference instantly.