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 Auckland

+12h

BST

BSTSOURCE

UTC+01:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Auckland

NZDT

New Zealand · UTC+13:00☀ DST active

HH12

MM00

(next day)00:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

BST

Auckland

12:00 AM

12:00 PM

2:00 AM

2:00 PM

4:00 AM

4:00 PM

6:00 AM

6:00 PM

8:00 AM

8:00 PM

10:00 AM

10:00 PM

12:00 PM

12:00 AM+1

2:00 PM

2:00 AM+1

4:00 PM

4:00 AM+1

6:00 PM

6:00 AM+1

8:00 PM

8:00 AM+1

10:00 PM

10:00 AM+1

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

BST and NZDT on the World Map

The map below highlights the BST (British Summer Time) and NZDT (New Zealand Standard Time) timezone regions across the globe.

BST Zone

→

NZDT 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

NZST – New Zealand Standard Time

UTC+12:00

New Zealand Standard Time (NZST) is the time zone for New Zealand, 12 hours ahead of UTC.

Countries in NZST

New Zealand

Major Cities in NZST

AucklandWellingtonChristchurchHamiltonDunedin

Key Facts about NZST

•New Zealand is among the first major countries to see a new day.
•NZST is 17 hours ahead of EST.
•New Zealand observes DST from September to April (Southern Hemisphere summer).

Daylight Saving:Yes – switches to NZDT

Learn more about NZST on Wikipedia

About Auckland

Wikipedia

Auckland operates on New Zealand Standard Time (NZST), UTC+12. As the first major city to see each day, Auckland opens global business ahead of all other markets.

Population:1.7 million

Metro:1.7 million

Business Hours:9:00 AM - 5:00 PM NZST

Currency:NZD (NZ$)

Stock Exchange:NZX (New Zealand Exchange)

Key Landmarks

Sky TowerAuckland Harbour BridgeAuckland War Memorial MuseumWaiheke IslandRangitoto Island

Did You Know?

Auckland is the first major city to see the sunrise each day (along with cities further east).

Learn more about NZDT timezone →

Understanding the +12h Gap: BST vs Auckland

BST runs on British Summer Time (BST) at UTC+01:00. Auckland runs on New Zealand Daylight Time (NZDT) at UTC+13:00, also currently on daylight saving time. That puts BST 12 hours ahead of Auckland — a difference of +12h at the current offsets.

In practice, when it is 9:00 AM in BST it is 9:00 PM in Auckland. Midnight in BST is 12:00 PM in Auckland.Auckland observes daylight saving time while BST does not, so the gap narrows or widens by an hour part of the year.

BST to Auckland time conversion table

BST (BST)	Auckland (NZDT)	Day
12:00 AM	12:00 PM	same day
6:00 AM	6:00 PM	same day
7:00 AM	7:00 PM	same day
8:00 AM	8:00 PM	same day
9:00 AM	9:00 PM	same day
12:00 PM	12:00 AM	next day
3:00 PM	3:00 AM	next day
5:00 PM	5:00 AM	next day
6:00 PM	6:00 AM	next day
9:00 PM	9:00 AM	next day

Why people convert BST to Auckland time

Scheduling a call from BST to Auckland: a 10:00 AM start in BST lands at 10:00 PM in Auckland, so you can confirm the slot without doing the arithmetic yourself.
Handling a +12h gap: BST and Auckland 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 Auckland is 9:00 PM in BST.
Watching a live event or market open: BST viewers need 9:00 PM in Auckland to catch a 9:00 AM start there, and 12:00 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 +12h gap is not.
With a +12h gap there is no shared 9-to-5 window, so alternate the early start: one week BST takes the early slot, the next week Auckland does.
Auckland: Clocks fall back on Sat, Apr 3, 2027. Any meeting series spanning that date will shift by an hour in local time.

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 NZST (New Zealand Standard Time)

New Zealand Standard Time (NZST) is the standard time zone for New Zealand and its dependencies. New Zealand is among the first countries to see a new calendar day. During summer (September to April), clocks advance to New Zealand Daylight Time (NZDT, UTC+13:00).

Best time to call between BST and Auckland

With a +12h offset there is no overlap inside a normal 9 AM – 5 PM day. Auckland opens at 9:00 AM NZDT, which is 9:00 PM in BST, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

BST and Auckland have no shared working hours because of the +12h gap. Teams need to alternate early starts or rely on asynchronous handovers.

BST is 12 hours ahead of Auckland (BST UTC+01:00 → NZDT UTC+13:00). 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

Auckland

☀ Currently in DST

Standard: UTC+12:00 · DST: UTC+13:00

Clocks fall back on Sat, Apr 3, 2027

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 Auckland?

BST (BST, UTC+01:00) is 12 hours ahead of Auckland (NZDT, UTC+13:00). The gap is currently +12h.

How do I convert BST time to Auckland time?

Add +12h to BST local time. For example, 9:00 AM in BST is 9:00 PM in Auckland.

What time is it in Auckland right now?

Auckland uses NZDT at UTC+13:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +12h offset from BST.

What is the best time to call Auckland from BST?

There is no shared working-hours window because of the +12h gap. The closest option is 1:00 PM in BST, which is 1:00 AM in Auckland.

Which is ahead, BST or Auckland?

BST is 12 hours ahead of Auckland. When it is 12:00 PM in BST it is 12:00 AM in Auckland.

Do BST and Auckland use different time zones?

BST uses BST at UTC+01:00, while Auckland (New Zealand) uses NZDT at UTC+13:00. The IANA identifiers are Europe/London and Pacific/Auckland.

Does daylight saving time affect the BST–Auckland difference?

Yes at the moment: Auckland is on daylight saving time and BST is not, so the +12h gap shifts by an hour when exactly one of them changes clocks.

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 Auckland?

Sometimes. The +12h gap is large enough that 8:00 PM or later in BST already falls on the next day in Auckland.

What is the time difference between BST and Auckland?

Auckland is +12h from BST.

What timezone is BST in?

BST operates on its local timezone.

What timezone is Auckland in?

Auckland operates on New Zealand Standard Time (NZST), UTC+12. As the first major city to see each day, Auckland opens global business ahead of all other markets.