GMT to EST

About GMT to EST

This page converts Greenwich Mean Time (GMT) to Eastern Time (ET). Pick a date and time, and the answer appears at once. Below it, a table shows every hour of that day.

ET is 5 hours behind GMT in winter, and 4 hours behind in summer, while the US is on daylight saving time. For example, 9:00 AM GMT is 4:00 AM EST in winter and 5:00 AM EDT in summer.

GMT is the time in London in winter, Dublin and Lisbon in winter, Reykjavik, Accra and Dakar all year. ET is the time in New York, Washington DC, Miami, Atlanta, Boston and Toronto.

The converter uses your browser's own time zone data, so daylight saving is handled for you — always right for the date you pick, in the past or the future.

Features

• One big answer — "9:00 AM GMT → 4:00 AM EST" style, with "next day" when the date changes
• Any date and time — the right offset for that day, summer or winter
• Every hour of the day — a live table for the date you pick, your hour highlighted
• Swap — one tap turns it into EST to GMT
• Add more zones — compare London, Tokyo or any other city at the same time
• Now — starts from the current time in GMT

GMT to EST time table

The difference changes when one side is on daylight saving time, so the table has a winter and a summer column. For one exact date, use the live table above.

Common times

• 9:00 AM GMT is 4:00 AM EST in winter and 5:00 AM EDT in summer
• 12:00 PM GMT is 7:00 AM EST in winter and 8:00 AM EDT in summer
• 5:00 PM GMT is 12:00 PM EST in winter and 1:00 PM EDT in summer
• 8:00 PM GMT is 3:00 PM EST in winter and 4:00 PM EDT in summer

Daylight saving time

Greenwich Mean Time (GMT, UTC+0) has no daylight saving time. It stays the same all year.

Eastern Time uses EST (UTC−5) in winter and EDT (UTC−4) in summer. The US clocks go forward on the second Sunday of March and back on the first Sunday of November: March 8, 2026 to November 1, 2026, and March 14, 2027 to November 7, 2027.

Good to know

• EST or ET? Strictly, EST is only the winter time of the US East Coast; in summer it is EDT. Many people say "EST" all year when they mean "East Coast time". This page uses the real clock time for the date you pick, so the answer is right either way.
• GMT is not always UK time. London uses GMT only in winter. From late March to late October the UK is on BST (British Summer Time, UTC+1). For London time, add London in the converter.
• Planning a meeting? Pick the date and time, then add the other cities of the people you meet with. Everyone's time shows in one list.
• The answer comes from your device's time zone data. Nothing is sent anywhere.

How to use it

• The time is set to now in GMT — change the date and time to the one you need
• Read the answer in the big box: the time in ET
• Look at the table for every hour of that day
• Press Swap to convert EST to GMT instead
• Add more time zones from the list to compare other cities

Frequently asked questions

How many hours between GMT and EST?

ET is 5 hours behind GMT in winter, and 4 hours behind in summer, while the US is on daylight saving time.

What is 9:00 AM GMT in EST?

9:00 AM GMT is 4:00 AM EST in winter and 5:00 AM EDT in summer.

Does daylight saving change GMT to EST?

Yes. ET is 5 hours behind GMT in winter, and 4 hours behind in summer, while the US is on daylight saving time. The converter shows the right time for the date you pick.

Is GMT the same as UK time?

Only in winter. From the last Sunday of March to the last Sunday of October the UK uses BST (British Summer Time, UTC+1), one hour ahead of GMT. GMT itself never changes.

Related tools

• Time Zone Converter — any time zone to many others at once
• World Clock — the time now in cities around the world
• EST to PST — Eastern Time to Pacific Time
• PST to EST — Pacific Time to Eastern Time
• UTC to EST — Coordinated Universal Time to Eastern Time
• EST to UTC — Eastern Time to Coordinated Universal Time
• EST to IST — Eastern Time to India Standard Time
• CET to EST — Central European Time to Eastern Time