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 NST

-4h 30m

BST

BSTSOURCE

UTC+01:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

NST

UTC-02:30☀ DST active

HH07

MM30

07:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

BST

NST

12:00 AM

8:30 PM-1

2:00 AM

10:30 PM-1

4:00 AM

12:30 AM

6:00 AM

2:30 AM

8:00 AM

4:30 AM

10:00 AM

6:30 AM

12:00 PM

8:30 AM

2:00 PM

10:30 AM

4:00 PM

12:30 PM

6:00 PM

2:30 PM

8:00 PM

4:30 PM

10:00 PM

6:30 PM

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

BST and NST on the World Map

The map below highlights the BST (British Summer Time) and NST (Newfoundland Standard Time) timezone regions across the globe.

BST Zone

→

NST 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

NST – Newfoundland Standard Time

UTC-03:30

Newfoundland Standard Time (NST) is a unique half-hour offset time zone in Canada, 3.5 hours behind UTC.

Countries in NST

Canada (Newfoundland)

Major Cities in NST

St. John'sCorner BrookMount Pearl

Key Facts about NST

•NST is one of only a few half-hour offset time zones in the world.
•Newfoundland joined Canada in 1949 and kept its unique time zone.
•St. John's is the easternmost city in North America.

Daylight Saving:Yes – switches to NDT

Learn more about NST on Wikipedia

BST vs NST: Offsets, DST and Best Call Times

BST runs on British Summer Time (BST) at UTC+01:00. NST runs on Newfoundland Standard Time (NST) at UTC-03:30. That puts BST 4 hours 30 minutes behind NST — a difference of -4h 30m at the current offsets.

In practice, when it is 9:00 AM in BST it is 4:30 AM in NST. Midnight in BST is 7:30 PM in NST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

BST to NST time conversion table

BST (BST)	NST (NST)	Day
12:00 AM	7:30 PM	previous day
6:00 AM	1:30 AM	same day
7:00 AM	2:30 AM	same day
8:00 AM	3:30 AM	same day
9:00 AM	4:30 AM	same day
12:00 PM	7:30 AM	same day
3:00 PM	10:30 AM	same day
5:00 PM	12:30 PM	same day
6:00 PM	1:30 PM	same day
9:00 PM	4:30 PM	same day

Why people convert BST to NST time

Scheduling a call from BST to NST: a 10:00 AM start in BST lands at 5:30 AM in NST, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both BST and NST are inside the 9-to-5 working day between 1:30 PM and 5:00 PM BST time (9:00 AM–12:30 PM NST). That is roughly 3 hours 30 minutes of usable overlap.
Keeping family and friends in sync: knowing that 8:00 PM in BST is 3:30 PM in NST 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 -4h 30m gap is not.
Block 1:30 PM–5:00 PM BST as the recurring meeting window if you work primarily from BST and need NST 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 NST (Newfoundland Standard Time)

Newfoundland Standard Time (NST) is one of the few half-hour offset time zones in the world. It covers the island of Newfoundland in Canada and is 30 minutes ahead of Atlantic Standard Time. This unique offset exists because Newfoundland was an independent country until 1949.

Best time to call between BST and NST

Both BST and NST sit inside the 9 AM – 5 PM working day between 1:30 PM–5:00 PM BST, which is 9:00 AM–12:30 PM NST. That gives roughly 3 hours and 30 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

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

BST is 4 hours 30 minutes behind NST (BST UTC+01:00 → NST UTC-03:30). The shared working window is 1:30 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

NST

☀ Currently in DST

Standard: UTC-03:30 · DST: UTC-02:30

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 NST?

BST (BST, UTC+01:00) is 4 hours 30 minutes behind NST (NST, UTC-03:30). The gap is currently -4h 30m.

How do I convert BST time to NST time?

Add -4h 30m to BST local time. For example, 9:00 AM in BST is 4:30 AM in NST.

What time is it in NST right now?

NST uses NST at UTC-03:30. Use the live converter at the top of this page — it updates in real time and already accounts for the -4h 30m offset from BST.