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).

BDST to KST

+3h

BDST

BDSTSOURCE

UTC+06:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

KST

UTC+09:00

HH03

MM00

15:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

BDST

KST

12:00 AM

3:00 AM

2:00 AM

5:00 AM

4:00 AM

7:00 AM

6:00 AM

9:00 AM

8:00 AM

11:00 AM

10:00 AM

1:00 PM

12:00 PM

3:00 PM

2:00 PM

5:00 PM

4:00 PM

7:00 PM

6:00 PM

9:00 PM

8:00 PM

11:00 PM

10:00 PM

1:00 AM+1

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

BDST and KST on the World Map

The map below highlights the BDST (Bangladesh Standard Time) and KST (Korea Standard Time) timezone regions across the globe.

BDST Zone

→

KST Zone

Explore all world timezones interactively →

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

KST – Korea Standard Time

UTC+09:00

Korea Standard Time (KST) is the time zone for South Korea, 9 hours ahead of UTC.

Countries in KST

South KoreaNorth Korea

Major Cities in KST

SeoulBusanIncheonDaeguDaejeonPyongyang

Key Facts about KST

•South Korea does not observe daylight saving time.
•Seoul is home to Samsung, LG, and Hyundai headquarters.
•KST is the same offset as JST (UTC+09:00).

Daylight Saving:No – UTC+09:00 year-round

Learn more about KST on Wikipedia

BDST to KST Time Difference – Complete Guide

BDST runs on Bangladesh Standard Time (BDST) at UTC+06:00. KST runs on Korea Standard Time (KST) at UTC+09:00. That puts BDST 3 hours ahead of KST — a difference of +3h at the current offsets.

In practice, when it is 9:00 AM in BDST it is 12:00 PM in KST. Midnight in BDST is 3:00 AM in KST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

BDST to KST time conversion table

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

Why people convert BDST to KST time

Scheduling a call from BDST to KST: a 10:00 AM start in BDST lands at 1:00 PM in KST, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both BDST and KST are inside the 9-to-5 working day between 9:00 AM and 2:00 PM BDST time (12:00 PM–5:00 PM KST). That is roughly 5 hours of usable overlap.
Booking travel or deliveries: tracking KST local time against BDST keeps pickup windows and arrival estimates honest across the +3h offset.

Always state the zone abbreviation, not just the hour. "3:00 PM BDST" is unambiguous; "3 PM" across a +3h gap is not.
Block 9:00 AM–2:00 PM BDST as the recurring meeting window if you work primarily from BDST and need KST colleagues present.

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.

About KST (Korea Standard Time)

Korea Standard Time (KST) is the time zone used in South Korea. It shares the same UTC offset as Japan Standard Time but is a distinct time zone. South Korea does not observe daylight saving time. Seoul, the capital, is a major global tech and business hub.

Best time to call between BDST and KST

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

Business hours overlap

BDST and KST share 5 hours of working-hours overlap (9:00 AM–2:00 PM BDST), so scheduling a live meeting is straightforward.

BDST is 3 hours ahead of KST (BDST UTC+06:00 → KST UTC+09:00). The shared working window is 9:00 AM–2:00 PM BDST. Remember to re-check around daylight-saving transitions.

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 BDST and KST?

BDST (BDST, UTC+06:00) is 3 hours ahead of KST (KST, UTC+09:00). The gap is currently +3h.

How do I convert BDST time to KST time?

Add +3h to BDST local time. For example, 9:00 AM in BDST is 12:00 PM in KST.

What time is it in KST right now?

KST uses KST at UTC+09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +3h offset from BDST.

What is the best time to call KST from BDST?

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

Which is ahead, BDST or KST?

BDST is 3 hours ahead of KST. When it is 12:00 PM in BDST it is 3:00 PM in KST.

Does daylight saving time affect the BDST–KST difference?

Neither zone observes daylight saving time, so the +3h offset between BDST and KST is fixed all year.

Which other cities share BDST's time zone?

BDST also covers Dhaka, Chittagong, Khulna, Rajshahi, Sylhet.

Which countries use BDST, BDST's zone?

BDST is used in Bangladesh.

Is there a day difference between BDST and KST?

Not normally. The +3h gap only pushes the date over for late-evening times.

What is the time difference between BDST and KST?

KST is +3h from BDST.

What timezone is BDST in?

BDST operates on its local timezone.

What timezone is KST in?

KST operates on its local timezone.

Which countries use BDST (Bangladesh Standard Time)?

BDST is used in Bangladesh.

Does BDST observe daylight saving time?

No, BDST does not observe daylight saving time and remains at UTC+06:00 year-round.

What are some interesting 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.