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 São Paulo

-4h

BST

BSTSOURCE

UTC+01:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

São Paulo

BRT

Brazil · UTC-03:00

HH08

MM00

08:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

BST

São Paulo

12:00 AM

8:00 PM-1

2:00 AM

10:00 PM-1

4:00 AM

12:00 AM

6:00 AM

2:00 AM

8:00 AM

4:00 AM

10:00 AM

6:00 AM

12:00 PM

8:00 AM

2:00 PM

10:00 AM

4:00 PM

12:00 PM

6:00 PM

2:00 PM

8:00 PM

4:00 PM

10:00 PM

6:00 PM

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

BST and BRT on the World Map

The map below highlights the BST (British Summer Time) and BRT (Brasilia Time) timezone regions across the globe.

BST Zone

→

BRT 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

BRT – Brasilia Time

UTC-03:00

Brasilia Time (BRT) is the time zone for eastern Brazil, 3 hours behind UTC.

Countries in BRT

Brazil (eastern)

Major Cities in BRT

São PauloRio de JaneiroBrasíliaBelo HorizonteSalvadorFortalezaRecifeCuritiba

Key Facts about BRT

•Brazil abolished daylight saving time in 2019.
•São Paulo is the largest city in the Southern Hemisphere.
•BRT is 2 hours ahead of EST.
•Brazil spans four different time zones.
•The B3 stock exchange in São Paulo operates on BRT.

Daylight Saving:No – UTC-03:00 year-round

Learn more about BRT on Wikipedia

About São Paulo

Wikipedia

São Paulo operates on Brasília Time (BRT), UTC-3. As South America's largest financial center, São Paulo's B3 exchange is the Americas' second-largest.

Population:12.4 million

Metro:22.4 million

Business Hours:9:00 AM - 6:00 PM BRT

Currency:BRL (R$)

Stock Exchange:B3 (Brasil Bolsa Balcão)

Key Landmarks

Paulista AvenueIbirapuera ParkSão Paulo CathedralMASPPinacoteca

Did You Know?

The city has more helicopters than any other city in the world due to traffic congestion.

Learn more about BRT timezone →

Time Conversion Guide: BST to São Paulo

BST runs on British Summer Time (BST) at UTC+01:00. São Paulo runs on Brasilia Standard Time (BRT) at UTC-03:00. That puts BST 4 hours behind São Paulo — a difference of -4h at the current offsets.

In practice, when it is 9:00 AM in BST it is 5:00 AM in São Paulo. Midnight in BST is 8:00 PM in São Paulo. Neither zone observes daylight saving time, so the offset between them stays constant all year.

BST to São Paulo time conversion table

BST (BST)	São Paulo (BRT)	Day
12:00 AM	8:00 PM	previous day
6:00 AM	2:00 AM	same day
7:00 AM	3:00 AM	same day
8:00 AM	4:00 AM	same day
9:00 AM	5:00 AM	same day
12:00 PM	8:00 AM	same day
3:00 PM	11:00 AM	same day
5:00 PM	1:00 PM	same day
6:00 PM	2:00 PM	same day
9:00 PM	5:00 PM	same day

Why people convert BST to São Paulo time

Scheduling a call from BST to São Paulo: a 10:00 AM start in BST lands at 6:00 AM in São Paulo, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both BST and São Paulo are inside the 9-to-5 working day between 1:00 PM and 5:00 PM BST time (9:00 AM–1:00 PM BRT). That is roughly 4 hours of usable overlap.
Watching a live event or market open: BST viewers need 5:00 AM in São Paulo to catch a 9:00 AM start there, and 4:00 AM 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 -4h gap is not.
Block 1:00 PM–5:00 PM BST as the recurring meeting window if you work primarily from BST and need São Paulo 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 BRT (Brasilia Time)

Brasilia Time (BRT) is the standard time in the most populous regions of Brazil, including São Paulo, Rio de Janeiro, and the capital Brasília. Brazil abolished daylight saving time in 2019, so BRT is now observed year-round in these regions. Brazil spans four time zones in total.

Best time to call between BST and São Paulo

Both BST and São Paulo sit inside the 9 AM – 5 PM working day between 1:00 PM–5:00 PM BST, which is 9:00 AM–1:00 PM BRT. That gives roughly 4 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

BST and São Paulo overlap for about 4 hours during the working day — enough for meetings if you avoid the edges of the window.

BST is 4 hours behind São Paulo (BST UTC+01:00 → BRT UTC-03:00). The shared working window is 1:00 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

São Paulo

Does not observe DST

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 São Paulo?

BST (BST, UTC+01:00) is 4 hours behind São Paulo (BRT, UTC-03:00). The gap is currently -4h.

How do I convert BST time to São Paulo time?

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

What time is it in São Paulo right now?

São Paulo uses BRT at UTC-03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -4h offset from BST.

What is the best time to call São Paulo from BST?

Call between 1:00 PM and 5:00 PM BST — that maps to 9:00 AM–1:00 PM BRT and keeps both parties inside the working day.

Which is behind, BST or São Paulo?

BST is 4 hours behind São Paulo. When it is 12:00 PM in BST it is 8:00 AM in São Paulo.

Do BST and São Paulo use different time zones?

BST uses BST at UTC+01:00, while São Paulo (Brazil) uses BRT at UTC-03:00. The IANA identifiers are Europe/London and America/Sao_Paulo.

Does daylight saving time affect the BST–São Paulo difference?

Neither zone observes daylight saving time, so the -4h offset between BST and São Paulo 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 São Paulo?

Not normally. The -4h gap only pushes the date over the previous day.

What is the time difference between BST and São Paulo?

São Paulo is -4h from BST.

What timezone is BST in?

BST operates on its local timezone.

What timezone is São Paulo in?

São Paulo operates on Brasília Time (BRT), UTC-3. As South America's largest financial center, São Paulo's B3 exchange is the Americas' second-largest.