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 BDST

+5h

BST

BSTSOURCE

UTC+01:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

BDST

UTC+06:00

HH05

MM00

17:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

BST

BDST

12:00 AM

5:00 AM

2:00 AM

7:00 AM

4:00 AM

9:00 AM

6:00 AM

11:00 AM

8:00 AM

1:00 PM

10:00 AM

3:00 PM

12:00 PM

5:00 PM

2:00 PM

7:00 PM

4:00 PM

9:00 PM

6:00 PM

11:00 PM

8:00 PM

1:00 AM+1

10:00 PM

3:00 AM+1

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

BST and BDST on the World Map

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

BST Zone

→

BDST 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

BDST – Bangladesh Standard Time

UTC+06:00

Bangladesh Standard Time (BDST, UTC+06:00) is the time zone for Bangladesh, 6 hours ahead of UTC.

Countries in BDST

Bangladesh

Major Cities in BDST

DhakaChittagongKhulnaRajshahiSylhet

Key Facts about BDST

•Bangladesh uses a single time zone, UTC+06:00, across the entire country.
•Bangladesh does not observe daylight saving time, so the offset is fixed all year.
•Dhaka is one of the most densely populated cities globally.
•BDST is written here to distinguish it from British Summer Time (BST).

Daylight Saving:No – UTC+06:00 year-round

Learn more about BDST on Wikipedia

Time Conversion Guide: BST to BDST

BST runs on British Summer Time (BST) at UTC+01:00. BDST runs on Bangladesh Standard Time (BDST) at UTC+06:00. That puts BST 5 hours ahead of BDST — a difference of +5h at the current offsets.

In practice, when it is 9:00 AM in BST it is 2:00 PM in BDST. Midnight in BST is 5:00 AM in BDST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

BST to BDST time conversion table

BST (BST)	BDST (BDST)	Day
12:00 AM	5:00 AM	same day
6:00 AM	11:00 AM	same day
7:00 AM	12:00 PM	same day
8:00 AM	1:00 PM	same day
9:00 AM	2:00 PM	same day
12:00 PM	5:00 PM	same day
3:00 PM	8:00 PM	same day
5:00 PM	10:00 PM	same day
6:00 PM	11:00 PM	same day
9:00 PM	2:00 AM	next day

Why people convert BST to BDST time

Scheduling a call from BST to BDST: a 10:00 AM start in BST lands at 3:00 PM in BDST, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both BST and BDST are inside the 9-to-5 working day between 9:00 AM and 12:00 PM BST time (2:00 PM–5:00 PM BDST). That is roughly 3 hours of usable overlap.
Coordinating a BST-based team with BDST contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.

Always state the zone abbreviation, not just the hour. "3:00 PM BST" is unambiguous; "3 PM" across a +5h gap is not.
Block 9:00 AM–12:00 PM BST as the recurring meeting window if you work primarily from BST and need BDST 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 BDST (Bangladesh Standard Time)

Bangladesh Standard Time (BDST) is the single time zone used across Bangladesh, fixed at UTC+06:00 all year. Bangladesh has not observed daylight saving time since a short-lived experiment in 2009, so the gap between Bangladesh and every other zone is constant. Dhaka, the capital, is one of the most densely populated cities in the world. Because the country sits close to the middle of the UTC+06:00 band, solar noon is near 12:00 for most of the year. BDST is listed separately from British Summer Time, which shares the BST abbreviation but is UTC+01:00.

Best time to call between BST and BDST

Both BST and BDST sit inside the 9 AM – 5 PM working day between 9:00 AM–12:00 PM BST, which is 2:00 PM–5:00 PM BDST. That gives roughly 3 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

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

BST is 5 hours ahead of BDST (BST UTC+01:00 → BDST UTC+06:00). The shared working window is 9:00 AM–12:00 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

BDST

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 BDST?

BST (BST, UTC+01:00) is 5 hours ahead of BDST (BDST, UTC+06:00). The gap is currently +5h.

How do I convert BST time to BDST time?

Add +5h to BST local time. For example, 9:00 AM in BST is 2:00 PM in BDST.

What time is it in BDST right now?

BDST uses BDST at UTC+06:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +5h offset from BST.

What is the best time to call BDST from BST?

Call between 9:00 AM and 12:00 PM BST — that maps to 2:00 PM–5:00 PM BDST and keeps both parties inside the working day.

Which is ahead, BST or BDST?

BST is 5 hours ahead of BDST. When it is 12:00 PM in BST it is 5:00 PM in BDST.

Does daylight saving time affect the BST–BDST difference?

Neither zone observes daylight saving time, so the +5h offset between BST and BDST 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 BDST?

Not normally. The +5h gap only pushes the date over for late-evening times.

What is the time difference between BST and BDST?

BDST is +5h from BST.

What timezone is BST in?

BST operates on its local timezone.

What timezone is BDST in?

BDST operates on its local timezone.

Which countries use BST (British Summer Time)?

BST is used in United Kingdom.

Does BST observe daylight saving time?

Yes, BST switches to BST during summer months.

What are some interesting 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.

Which cities are in the BDST timezone?

Major cities in the BDST timezone include Dhaka, Chittagong, Khulna, Rajshahi, Sylhet.

What is the UTC offset for BDST?

Bangladesh Standard Time (BDST) is at UTC+06:00.

What should I know about the BDST timezone?

Bangladesh uses a single time zone, UTC+06:00, across the entire country. Bangladesh does not observe daylight saving time, so the offset is fixed all year.