Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

Bangladesh to Iran

-2h 30m

Bangladesh

BDSTSOURCE

UTC+06:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Iran

IRST

UTC+03:30

HH09

MM30

09:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Bangladesh

Iran

12:00 AM

9:30 PM-1

2:00 AM

11:30 PM-1

4:00 AM

1:30 AM

6:00 AM

3:30 AM

8:00 AM

5:30 AM

10:00 AM

7:30 AM

12:00 PM

9:30 AM

2:00 PM

11:30 AM

4:00 PM

1:30 PM

6:00 PM

3:30 PM

8:00 PM

5:30 PM

10:00 PM

7:30 PM

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

BDST and IRST on the World Map

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

BDST Zone

→

IRST 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

IRST – Iran Standard Time

UTC+03:30

Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.

Countries in IRST

Iran

Major Cities in IRST

TehranIsfahanMashhadTabrizShirazKaraj

Key Facts about IRST

•IRST is one of only a few time zones with a 30-minute offset.
•Iran observes daylight saving time, switching to IRDT (UTC+04:30).
•Tehran has a metropolitan population of over 16 million.

Daylight Saving:Yes – switches to IRDT

Learn more about IRST on Wikipedia

Everything You Need to Know About Bangladesh and Iran Time

Bangladesh runs on Bangladesh Standard Time (BDST) at UTC+06:00. Iran runs on Iran Standard Time (IRST) at UTC+03:30. That puts Bangladesh 2 hours 30 minutes behind Iran — a difference of -2h 30m at the current offsets.

In practice, when it is 9:00 AM in Bangladesh it is 6:30 AM in Iran. Midnight in Bangladesh is 9:30 PM in Iran. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Bangladesh to Iran time conversion table

Bangladesh (BDST)	Iran (IRST)	Day
12:00 AM	9:30 PM	previous day
6:00 AM	3:30 AM	same day
7:00 AM	4:30 AM	same day
8:00 AM	5:30 AM	same day
9:00 AM	6:30 AM	same day
12:00 PM	9:30 AM	same day
3:00 PM	12:30 PM	same day
5:00 PM	2:30 PM	same day
6:00 PM	3:30 PM	same day
9:00 PM	6:30 PM	same day

Why people convert Bangladesh to Iran time

Scheduling a call from Bangladesh to Iran: a 10:00 AM start in Bangladesh lands at 7:30 AM in Iran, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Bangladesh and Iran are inside the 9-to-5 working day between 11:30 AM and 5:00 PM BDST time (9:00 AM–2:30 PM IRST). That is roughly 5 hours 30 minutes of usable overlap.
Keeping family and friends in sync: knowing that 8:00 PM in Bangladesh is 5:30 PM in Iran makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM BDST" is unambiguous; "3 PM" across a -2h 30m gap is not.
Block 11:30 AM–5:00 PM BDST as the recurring meeting window if you work primarily from Bangladesh and need Iran 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 IRST (Iran Standard Time)

Iran Standard Time (IRST) is one of the few time zones with a 30-minute offset. Iran observes daylight saving time (IRDT, UTC+04:30) from late March to late September. Tehran, the capital, is one of the largest cities in the Middle East.

Best time to call between Bangladesh and Iran

Both Bangladesh and Iran sit inside the 9 AM – 5 PM working day between 11:30 AM–5:00 PM BDST, which is 9:00 AM–2:30 PM IRST. That gives roughly 5 hours and 30 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

Bangladesh and Iran share 5 hours of working-hours overlap (11:30 AM–5:00 PM BDST), so scheduling a live meeting is straightforward.

Bangladesh is 2 hours 30 minutes behind Iran (BDST UTC+06:00 → IRST UTC+03:30). The shared working window is 11:30 AM–5:00 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 Bangladesh and Iran?

Bangladesh (BDST, UTC+06:00) is 2 hours 30 minutes behind Iran (IRST, UTC+03:30). The gap is currently -2h 30m.

How do I convert Bangladesh time to Iran time?

Add -2h 30m to Bangladesh local time. For example, 9:00 AM in Bangladesh is 6:30 AM in Iran.

What time is it in Iran right now?

Iran uses IRST at UTC+03:30. Use the live converter at the top of this page — it updates in real time and already accounts for the -2h 30m offset from Bangladesh.

What is the best time to call Iran from Bangladesh?

Call between 11:30 AM and 5:00 PM BDST — that maps to 9:00 AM–2:30 PM IRST and keeps both parties inside the working day.

Which is behind, Bangladesh or Iran?

Bangladesh is 2 hours 30 minutes behind Iran. When it is 12:00 PM in Bangladesh it is 9:30 AM in Iran.

Do Bangladesh and Iran use different time zones?

Bangladesh (Bangladesh) uses BDST at UTC+06:00, while Iran (Iran) uses IRST at UTC+03:30. The IANA identifiers are Asia/Dhaka and Asia/Tehran.

Does daylight saving time affect the Bangladesh–Iran difference?

Neither zone observes daylight saving time, so the -2h 30m offset between Bangladesh and Iran is fixed all year.

Which other cities share Bangladesh's time zone?

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

Which countries use BDST, Bangladesh's zone?

BDST is used in Bangladesh.

Is there a day difference between Bangladesh and Iran?

Not normally. The -2h 30m gap only pushes the date over the previous day.

What is the time difference between Bangladesh and Iran?

Iran is -2h 30m from Bangladesh.

What timezone is Bangladesh in?

Bangladesh operates on its local timezone.

What timezone is Iran in?

Iran 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.