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).

United Kingdom to AEDT

+10h

United Kingdom

BSTSOURCE

UTC+01:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

AEDT

UTC+10:00DST observed

HH10

MM00

22:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

United Kingdom

AEDT

12:00 AM

9:00 AM

2:00 AM

11:00 AM

4:00 AM

1:00 PM

6:00 AM

3:00 PM

8:00 AM

5:00 PM

10:00 AM

7:00 PM

12:00 PM

9:00 PM

2:00 PM

11:00 PM

4:00 PM

1:00 AM+1

6:00 PM

3:00 AM+1

8:00 PM

5:00 AM+1

10:00 PM

7:00 AM+1

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

BST and AEDT on the World Map

The map below highlights the BST (Greenwich Mean Time) and AEDT (Australian Eastern Daylight Time) timezone regions across the globe.

BST Zone

→

AEDT Zone

Explore all world timezones interactively →

GMT – Greenwich Mean Time

UTC+00:00

Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.

Countries in GMT

United KingdomIrelandIcelandPortugal (mainland)GhanaSenegalMaliMauritaniaGambiaGuineaSierra LeoneLiberiaIvory CoastBurkina FasoMorocco (historically)

Major Cities in GMT

LondonDublinLisbonAccraReykjavikEdinburghCasablancaDakarBamakoAbidjanConakryFreetownMonrovia

Key Facts about GMT

•GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
•The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
•GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
•Iceland uses GMT year-round and never observes daylight saving time.
•The UK switches from GMT to BST (British Summer Time) in late March each year.

Daylight Saving:Yes – switches to BST

Learn more about GMT on Wikipedia

AEDT – Australian Eastern Daylight Time

UTC+11:00

Australian Eastern Daylight Time (AEDT, UTC+11:00) is the daylight saving period in south-eastern Australia, from October to April.

Countries in AEDT

Australia (NSW, Victoria, Tasmania, ACT)

Major Cities in AEDT

SydneyMelbourneCanberraHobartNewcastle

Key Facts about AEDT

•AEDT runs from the first Sunday in October to the first Sunday in April.
•AEDT is one hour ahead of Australian Eastern Standard Time (AEST).
•Queensland does not observe daylight saving, so Brisbane stays on AEST.
•During AEDT, Sydney is 16 hours ahead of New York and 11 hours ahead of UTC.

Daylight Saving:Yes – switches to AEDT

Learn more about AEDT on Wikipedia

United Kingdom vs AEDT: Offsets, DST and Best Call Times

United Kingdom runs on British Summer Time (BST) at UTC+01:00, currently observing daylight saving time. AEDT runs on Australian Eastern Daylight Time (AEDT) at UTC+11:00. That puts United Kingdom 10 hours ahead of AEDT — a difference of +10h at the current offsets.

In practice, when it is 9:00 AM in United Kingdom it is 7:00 PM in AEDT. Midnight in United Kingdom is 10:00 AM in AEDT.United Kingdom observes daylight saving time while AEDT does not, so the gap narrows or widens by an hour part of the year.

United Kingdom to AEDT time conversion table

United Kingdom (BST)	AEDT (AEDT)	Day
12:00 AM	10:00 AM	same day
6:00 AM	4:00 PM	same day
7:00 AM	5:00 PM	same day
8:00 AM	6:00 PM	same day
9:00 AM	7:00 PM	same day
12:00 PM	10:00 PM	same day
3:00 PM	1:00 AM	next day
5:00 PM	3:00 AM	next day
6:00 PM	4:00 AM	next day
9:00 PM	7:00 AM	next day

Why people convert United Kingdom to AEDT time

Scheduling a call from United Kingdom to AEDT: a 10:00 AM start in United Kingdom lands at 8:00 PM in AEDT, so you can confirm the slot without doing the arithmetic yourself.
Handling a +10h gap: United Kingdom and AEDT have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in AEDT is 7:00 PM in United Kingdom.
Keeping family and friends in sync: knowing that 8:00 PM in United Kingdom is 6:00 AM in AEDT makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM BST" is unambiguous; "3 PM" across a +10h gap is not.
With a +10h gap there is no shared 9-to-5 window, so alternate the early start: one week United Kingdom takes the early slot, the next week AEDT does.
United Kingdom: Clocks fall back on Sun, Oct 25, 2026. Re-check this page after that date because the offset changes and so does the +10h gap.

About GMT (Greenwich Mean Time)

Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.

About AEDT (Australian Eastern Daylight Time)

Australian Eastern Daylight Time (AEDT) is the daylight saving period in south-eastern Australia, one hour ahead of Australian Eastern Standard Time (AEST, UTC+10:00). Because Australia is in the southern hemisphere, AEDT runs through the summer — from the first Sunday in October to the first Sunday in April — which is almost exactly the reverse of the European and North American schedules. New South Wales, Victoria, Tasmania and the Australian Capital Territory observe it; Queensland and the Northern Territory do not, so Brisbane stays on AEST year round while Sydney moves to AEDT. During AEDT, Sydney is 11 hours ahead of UTC and 16 hours ahead of New York.

Best time to call between United Kingdom and AEDT

With a +10h offset there is no overlap inside a normal 9 AM – 5 PM day. AEDT opens at 9:00 AM AEDT, which is 7:00 PM in United Kingdom, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

United Kingdom and AEDT have no shared working hours because of the +10h gap. Teams need to alternate early starts or rely on asynchronous handovers.

United Kingdom is 10 hours ahead of AEDT (BST UTC+01:00 → AEDT UTC+11:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

United Kingdom

☀ Currently in DST

Standard: UTC+00:00 · DST: UTC+01:00

Clocks fall back on Sun, Oct 25, 2026

AEDT

❄ Currently in Standard Time

Standard: UTC+10:00 · DST: UTC+11:00

Clocks spring forward on Sat, Oct 3, 2026

⚠ These locations are currently in different DST states, so the time difference may change when clocks adjust.

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 United Kingdom and AEDT?

United Kingdom (BST, UTC+01:00) is 10 hours ahead of AEDT (AEDT, UTC+11:00). The gap is currently +10h.

How do I convert United Kingdom time to AEDT time?

Add +10h to United Kingdom local time. For example, 9:00 AM in United Kingdom is 7:00 PM in AEDT.

What time is it in AEDT right now?

AEDT uses AEDT at UTC+11:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +10h offset from United Kingdom.

What is the best time to call AEDT from United Kingdom?

There is no shared working-hours window because of the +10h gap. The closest option is 1:00 PM in United Kingdom, which is 11:00 PM in AEDT.

Which is ahead, United Kingdom or AEDT?

United Kingdom is 10 hours ahead of AEDT. When it is 12:00 PM in United Kingdom it is 10:00 PM in AEDT.

Do United Kingdom and AEDT use different time zones?

United Kingdom (United Kingdom) uses BST at UTC+01:00, while AEDT uses AEDT at UTC+11:00. The IANA identifiers are Europe/London and Australia/Sydney.

Does daylight saving time affect the United Kingdom–AEDT difference?

Yes at the moment: United Kingdom is on daylight saving time and AEDT is not, so the +10h gap shifts by an hour when exactly one of them changes clocks.

Which other cities share United Kingdom's time zone?

BST also covers London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar and 5 more.

Which countries use BST, United Kingdom's zone?

BST is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, Mali, Mauritania and 7 more.

Is there a day difference between United Kingdom and AEDT?

Not normally. The +10h gap only pushes the date over for late-evening times.

What is the time difference between United Kingdom and AEDT?

AEDT is +10h from United Kingdom.

What timezone is United Kingdom in?

United Kingdom operates on its local timezone.

What timezone is AEDT in?

AEDT operates on its local timezone.

Which countries use GMT (Greenwich Mean Time)?

GMT is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, and 9 more countries.

Does GMT observe daylight saving time?

Yes, GMT switches to BST during summer months.

What are some interesting facts about GMT?

GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.