UTC to EST Converter (and EST to UTC)

About this tool

This converter changes UTC into US Eastern Time and Eastern Time back into UTC. It opens at 12:00 noon UTC on today's date and tells you whether New York is on EST or EDT that day, which decides whether the gap is 5 hours or 4. Live clocks show the current UTC and Eastern time, and a printable chart below gives every hour with separate summer and winter columns.

How to use the UTC converter

1. Set the direction: UTC to Eastern for timestamps from servers, logs and APIs; Eastern to UTC when you need to hand a local time to a system that runs on UTC.
2. Enter the date and time. The date is essential here, because the answer shifts by an hour between seasons.
3. Read the result line and the detail beneath it, which lists the full zone names and offsets in force.
4. Copy result when you need to paste the conversion into a ticket or a message.

Why the offset is 5 hours in winter and 4 in summer

UTC, Coordinated Universal Time, is the reference that every civil time zone is measured from, and it has no daylight saving time. Eastern Standard Time is defined as UTC-05:00. When the US switches to daylight time, Eastern clocks move forward an hour to UTC-04:00. So:

• From the first Sunday in November to the second Sunday in March: Eastern = UTC minus 5 hours.
• From the second Sunday in March to the first Sunday in November: Eastern = UTC minus 4 hours.

Those dates come from the federal rule in 15 U.S.C. 260a. In UTC terms the switch happens at 07:00 UTC in March (2:00 AM EST becomes 3:00 AM EDT) and at 06:00 UTC in November (2:00 AM EDT becomes 1:00 AM EST). For 2026 those instants are March 8 at 07:00 UTC and November 1 at 06:00 UTC; for 2027 they are March 14 and November 7 at the same UTC times, as computed with Python's zoneinfo.

Worked example: noon UTC

The default input is 12:00 PM UTC today. On a summer date the converter shows 12:00 PM UTC = 8:00 AM EDT, with the detail line listing UTC+00:00 and Eastern Daylight Time at UTC-04:00, and stating that Eastern Time is 4 hours behind UTC on this date. In winter the same input gives 12:00 PM UTC = 7:00 AM EST and a 5-hour gap. Reversing the direction, 8:00 AM Eastern on a July date comes back as noon UTC.

Converting UTC in code instead of by hand

If you are converting timestamps in bulk, let a time zone library do it so DST is never missed. In Python 3.9 and later:

from datetime import datetime, timezone
from zoneinfo import ZoneInfo
utc = datetime(2026, 7, 15, 12, 0, tzinfo=timezone.utc)
print(utc.astimezone(ZoneInfo("America/New_York")))
# 2026-07-15 08:00:00-04:00

In JavaScript, new Date('2026-07-15T12:00:00Z').toLocaleString('en-US', {timeZone: 'America/New_York'}) returns 7/15/2026, 8:00:00 AM, and the same call for January 15 returns 7:00 AM. A spreadsheet formula such as =A2-TIME(5,0,0) is only right in winter; for summer rows you would need TIME(4,0,0), which is why a fixed subtraction is a common source of off-by-one-hour bugs. The trailing Z in timestamps like 2026-07-15T12:00:00Z marks the time as UTC, as defined in RFC 3339. For Unix epoch values, the Timestamp Converter turns them into readable UTC first.

Common mistakes

• Subtracting 5 hours all year. From March to November the right number is 4.
• Forgetting the date rolls back. 02:00 UTC on a Tuesday is still Monday evening in New York.
• Calling the summer result "EST". A time written as EST in July is, strictly, an hour off; ET avoids that.
• Assuming GMT and UTC differ by an hour. As offsets they are both zero; the hour difference people remember is the UK's summer time, BST. See GMT to EST for that case.

Use cases

Reading server logs, CI pipelines and monitoring alerts stamped in UTC; turning a UTC maintenance window from a cloud provider into New York time; checking when a UTC-scheduled livestream starts on the East Coast. For other pairs try UTC to PST or the multi-zone Time Zone Converter.