Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

BST to EDT

-5h

BST

BSTSOURCE

UTC+01:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

EDT

UTC-04:00☀ DST active

HH07

MM00

07:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

BST

EDT

12:00 AM

7:00 PM-1

2:00 AM

9:00 PM-1

4:00 AM

11:00 PM-1

6:00 AM

1:00 AM

8:00 AM

3:00 AM

10:00 AM

5:00 AM

12:00 PM

7:00 AM

2:00 PM

9:00 AM

4:00 PM

11:00 AM

6:00 PM

1:00 PM

8:00 PM

3:00 PM

10:00 PM

5:00 PM

Green rows indicate typical business hours (9 AM - 5 PM)

BST and EDT on the World Map

The map below highlights the BST (British Summer Time) and EDT (Eastern Daylight Time) timezone regions across the globe.

BST Zone

→

EDT Zone

Explore all world timezones interactively →

BST – British Summer Time

UTC+01:00

British Summer Time (BST, UTC+01:00) is the daylight saving period in the United Kingdom, running from late March to late October.

Countries in BST

United Kingdom

Major Cities in BST

LondonBirminghamManchesterGlasgowEdinburghCardiffBelfastLiverpoolBristolLeeds

Key Facts about BST

•BST runs from the last Sunday in March to the last Sunday in October.
•BST is exactly one hour ahead of GMT, the UK's standard time.
•During BST, London is 4 hours ahead of New York while the US is on Eastern Daylight Time.
•The Isle of Man and the Channel Islands also observe BST.

Daylight Saving:Yes – switches to BST

Learn more about BST on Wikipedia

EDT – Eastern Daylight Time

UTC-04:00

Eastern Daylight Time (EDT) is the daylight saving time observed in the Eastern Time Zone, 4 hours behind UTC.

Countries in EDT

United States (Eastern)Canada (Ontario, Quebec)BahamasHaitiTurks and Caicos

Major Cities in EDT

New York CityWashington D.C.TorontoMiamiPhiladelphiaAtlantaBostonMontreal

Key Facts about EDT

•EDT is observed from the second Sunday of March to the first Sunday of November.
•During EDT, the US East Coast is only 4 hours behind London (instead of 5).
•Not all EST locations switch to EDT – Panama and Jamaica stay on EST year-round.

Daylight Saving:Yes – switches to EST

Learn more about EDT on Wikipedia

Time Conversion Guide: BST to EDT

BST runs on British Summer Time (BST) at UTC+01:00. EDT runs on Eastern Daylight Time (EDT) at UTC-04:00. That puts BST 5 hours behind EDT — a difference of -5h at the current offsets.

In practice, when it is 9:00 AM in BST it is 4:00 AM in EDT. Midnight in BST is 7:00 PM in EDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.

BST to EDT time conversion table

BST (BST)	EDT (EDT)	Day
12:00 AM	7:00 PM	previous day
6:00 AM	1:00 AM	same day
7:00 AM	2:00 AM	same day
8:00 AM	3:00 AM	same day
9:00 AM	4:00 AM	same day
12:00 PM	7:00 AM	same day
3:00 PM	10:00 AM	same day
5:00 PM	12:00 PM	same day
6:00 PM	1:00 PM	same day
9:00 PM	4:00 PM	same day

Why people convert BST to EDT time

Scheduling a call from BST to EDT: a 10:00 AM start in BST lands at 5:00 AM in EDT, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both BST and EDT are inside the 9-to-5 working day between 2:00 PM and 5:00 PM BST time (9:00 AM–12:00 PM EDT). That is roughly 3 hours of usable overlap.
Booking travel or deliveries: tracking EDT local time against BST keeps pickup windows and arrival estimates honest across the -5h offset.

Always state the zone abbreviation, not just the hour. "3:00 PM BST" is unambiguous; "3 PM" across a -5h gap is not.
Block 2:00 PM–5:00 PM BST as the recurring meeting window if you work primarily from BST and need EDT colleagues present.

About BST (British Summer Time)

British Summer Time (BST) is the daylight saving period in the United Kingdom, when clocks move one hour forward from Greenwich Mean Time (GMT, UTC+00:00) to UTC+01:00. It runs from the last Sunday in March to the last Sunday in October. England, Scotland, Wales and Northern Ireland all follow it, along with the Isle of Man and the Channel Islands of Jersey and Guernsey. During BST, London is one hour ahead of UTC, four hours ahead of New York on Eastern Daylight Time, and five hours ahead of New York once the United States returns to Eastern Standard Time in November. BST is also used to abbreviate Bangladesh Standard Time (UTC+06:00), which is listed separately on this site.

About EDT (Eastern Daylight Time)

Eastern Daylight Time (EDT) is used during the summer months (second Sunday of March to the first Sunday of November) in the Eastern Time Zone. During EDT, clocks are advanced by one hour to take advantage of longer daylight hours. Not all locations in the Eastern Time Zone observe DST – Panama, Jamaica, and most of the Caribbean remain on EST year-round.

Best time to call between BST and EDT

Both BST and EDT sit inside the 9 AM – 5 PM working day between 2:00 PM–5:00 PM BST, which is 9:00 AM–12:00 PM EDT. That gives roughly 3 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

BST and EDT overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.

BST is 5 hours behind EDT (BST UTC+01:00 → EDT UTC-04:00). The shared working window is 2:00 PM–5:00 PM BST. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

BST

☀ Currently in DST

Standard: UTC+00:00 · DST: UTC+01:00

Clocks fall back on Sun, Oct 25, 2026

EDT

☀ Currently in DST

Standard: UTC-05:00 · DST: UTC-04:00

Clocks fall back on Sun, Nov 1, 2026

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between BST and EDT?

BST (BST, UTC+01:00) is 5 hours behind EDT (EDT, UTC-04:00). The gap is currently -5h.

How do I convert BST time to EDT time?

Add -5h to BST local time. For example, 9:00 AM in BST is 4:00 AM in EDT.

What time is it in EDT right now?

EDT uses EDT at UTC-04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -5h offset from BST.

What is the best time to call EDT from BST?

Call between 2:00 PM and 5:00 PM BST — that maps to 9:00 AM–12:00 PM EDT and keeps both parties inside the working day.

Which is behind, BST or EDT?

BST is 5 hours behind EDT. When it is 12:00 PM in BST it is 7:00 AM in EDT.

Does daylight saving time affect the BST–EDT difference?

Neither zone observes daylight saving time, so the -5h offset between BST and EDT is fixed all year.

Which other cities share BST's time zone?

BST also covers London, Birmingham, Manchester, Glasgow, Edinburgh, Cardiff, Belfast, Liverpool and 2 more.

Which countries use BST, BST's zone?

BST is used in United Kingdom.

Is there a day difference between BST and EDT?

Not normally. The -5h gap only pushes the date over the previous day.

What is the time difference between BST and EDT?

EDT is -5h from BST.

What timezone is BST in?

BST operates on its local timezone.

What timezone is EDT in?

EDT operates on its local timezone.

Which countries use BST (British Summer Time)?

BST is used in United Kingdom.

Does BST observe daylight saving time?

Yes, BST switches to BST during summer months.

What are some interesting facts about BST?

BST runs from the last Sunday in March to the last Sunday in October. BST is exactly one hour ahead of GMT, the UK's standard time.

Which cities are in the EDT timezone?

Major cities in the EDT timezone include New York City, Washington D.C., Toronto, Miami, Philadelphia, Atlanta, Boston, Montreal.

What is the UTC offset for EDT?

Eastern Daylight Time (EDT) is at UTC-04:00. During daylight saving time, it shifts to EST.

What should I know about the EDT timezone?

EDT is observed from the second Sunday of March to the first Sunday of November. During EDT, the US East Coast is only 4 hours behind London (instead of 5).