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).

Honolulu to BDST

+16h

Honolulu

HSTSOURCE

USA · UTC-10:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

BDST

UTC+06:00

HH04

MM00

(next day)04:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Honolulu

BDST

12:00 AM

4:00 PM

2:00 AM

6:00 PM

4:00 AM

8:00 PM

6:00 AM

10:00 PM

8:00 AM

12:00 AM+1

10:00 AM

2:00 AM+1

12:00 PM

4:00 AM+1

2:00 PM

6:00 AM+1

4:00 PM

8:00 AM+1

6:00 PM

10:00 AM+1

8:00 PM

12:00 PM+1

10:00 PM

2:00 PM+1

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

HST and BDST on the World Map

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

HST Zone

→

BDST Zone

Explore all world timezones interactively →

HST – Hawaii Standard Time

UTC-10:00

Hawaii Standard Time (HST) is the time zone for the Hawaiian Islands, 10 hours behind UTC.

Countries in HST

United States (Hawaii)

Major Cities in HST

HonoluluHiloKailuaPearl CityKapolei

Key Facts about HST

•Hawaii does not observe daylight saving time.
•HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
•Hawaii is one of only two US states that don't observe DST (the other is Arizona).

Daylight Saving:No – UTC-10:00 year-round

Learn more about HST 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

About Honolulu

Wikipedia

Honolulu operates on Hawaii Standard Time (HST), UTC-10 with no daylight saving. Hawaii's consistent time makes it a predictable connection between Asia and mainland USA.

Population:350,000

Metro:1 million

Business Hours:8:00 AM - 5:00 PM HST

Currency:USD ($)

Key Landmarks

Waikiki BeachDiamond HeadPearl HarborIolani PalaceHanauma Bay

Did You Know?

Pearl Harbor memorial receives over 2 million visitors annually.

Learn more about HST timezone →

Comparing Time Zones: Honolulu and BDST

Honolulu runs on Hawaii-Aleutian Standard Time (HST) at UTC-10:00. BDST runs on Bangladesh Standard Time (BDST) at UTC+06:00. That puts Honolulu 16 hours ahead of BDST — a difference of +16h at the current offsets.

In practice, when it is 9:00 AM in Honolulu it is 1:00 AM in BDST on the next day. Midnight in Honolulu is 4:00 PM in BDST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Honolulu to BDST time conversion table

Honolulu (HST)	BDST (BDST)	Day
12:00 AM	4:00 PM	same day
6:00 AM	10:00 PM	same day
7:00 AM	11:00 PM	same day
8:00 AM	12:00 AM	next day
9:00 AM	1:00 AM	next day
12:00 PM	4:00 AM	next day
3:00 PM	7:00 AM	next day
5:00 PM	9:00 AM	next day
6:00 PM	10:00 AM	next day
9:00 PM	1:00 PM	next day

Why people convert Honolulu to BDST time

Scheduling a call from Honolulu to BDST: a 10:00 AM start in Honolulu lands at 2:00 AM in BDST the next day, so you can confirm the slot without doing the arithmetic yourself.
Handling a +16h gap: Honolulu and BDST have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in BDST is 1:00 AM in Honolulu.
Keeping family and friends in sync: knowing that 8:00 PM in Honolulu is 12:00 PM in BDST makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM HST" is unambiguous; "3 PM" across a +16h gap is not.
With a +16h gap there is no shared 9-to-5 window, so alternate the early start: one week Honolulu takes the early slot, the next week BDST does.

About HST (Hawaii Standard Time)

Hawaii Standard Time (HST) is used in the state of Hawaii and does not observe daylight saving time. This makes HST one of the most consistent time zones in the US. The Hawaiian Islands are among the last places on Earth to see a new calendar day.

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 Honolulu and BDST

With a +16h offset there is no overlap inside a normal 9 AM – 5 PM day. BDST opens at 9:00 AM BDST, which is 1:00 AM in Honolulu, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Honolulu and BDST have no shared working hours because of the +16h gap. Teams need to alternate early starts or rely on asynchronous handovers.

Honolulu is 16 hours ahead of BDST (HST UTC-10:00 → BDST UTC+06:00). There is no shared 9-to-5 window, so plan around an early or late slot. 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 Honolulu and BDST?

Honolulu (HST, UTC-10:00) is 16 hours ahead of BDST (BDST, UTC+06:00). The gap is currently +16h.

How do I convert Honolulu time to BDST time?

Add +16h to Honolulu local time. For example, 9:00 AM in Honolulu is 1:00 AM in BDST (next day).

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 +16h offset from Honolulu.

What is the best time to call BDST from Honolulu?

There is no shared working-hours window because of the +16h gap. The closest option is 1:00 PM in Honolulu, which is 5:00 AM in BDST.

Which is ahead, Honolulu or BDST?

Honolulu is 16 hours ahead of BDST. When it is 12:00 PM in Honolulu it is 4:00 AM in BDST.

Do Honolulu and BDST use different time zones?

Honolulu (USA) uses HST at UTC-10:00, while BDST uses BDST at UTC+06:00. The IANA identifiers are Pacific/Honolulu and Asia/Dhaka.

Does daylight saving time affect the Honolulu–BDST difference?

Neither zone observes daylight saving time, so the +16h offset between Honolulu and BDST is fixed all year.

Which other cities share Honolulu's time zone?

HST also covers Honolulu, Hilo, Kailua, Pearl City, Kapolei.

Which countries use HST, Honolulu's zone?

HST is used in United States (Hawaii).

Is there a day difference between Honolulu and BDST?

Sometimes. The +16h gap is large enough that 8:00 PM or later in Honolulu already falls on the next day in BDST.

What is the time difference between Honolulu and BDST?

BDST is +16h from Honolulu.

What timezone is Honolulu in?

Honolulu operates on Hawaii Standard Time (HST), UTC-10 with no daylight saving. Hawaii's consistent time makes it a predictable connection between Asia and mainland USA.

What timezone is BDST in?

BDST operates on its local timezone.

What are the business hours in Honolulu?

Standard business hours in Honolulu are 8:00 AM - 5:00 PM HST.

Which countries use HST (Hawaii Standard Time)?

HST is used in United States (Hawaii).

Does HST observe daylight saving time?

No, HST does not observe daylight saving time and remains at UTC-10:00 year-round.

What are some interesting facts about HST?

Hawaii does not observe daylight saving time. HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.

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.