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 AEDT

+10h

BST

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

BST

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 (British Summer Time) and AEDT (Australian Eastern Daylight Time) timezone regions across the globe.

BST Zone

→

AEDT 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

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

Comparing Time Zones: BST and AEDT

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

In practice, when it is 9:00 AM in BST it is 7:00 PM in AEDT. Midnight in BST is 10:00 AM in AEDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.

BST to AEDT time conversion table

BST (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 BST to AEDT time

Scheduling a call from BST to AEDT: a 10:00 AM start in BST lands at 8:00 PM in AEDT, so you can confirm the slot without doing the arithmetic yourself.
Handling a +10h gap: BST 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 BST.
Watching a live event or market open: BST viewers need 7:00 PM in AEDT to catch a 9:00 AM start there, and 2:00 PM if the event is anchored to BST.

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 BST takes the early slot, the next week AEDT does.

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 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 BST 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 BST, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

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

BST 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

BST

☀ 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 BST and AEDT?

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

How do I convert BST time to AEDT time?

Add +10h to BST local time. For example, 9:00 AM in BST 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 BST.