BDST to HST
-16hBDST
BDSTSOURCEHST
HSTGreen rows indicate typical business hours (9 AM - 5 PM)
BDST and HST on the World Map
The map below highlights the BDST (Bangladesh Standard Time) and HST (Hawaii Standard Time) timezone regions across the globe.
BDST – Bangladesh Standard Time
UTC+06:00Bangladesh Standard Time (BDST, UTC+06:00) is the time zone for Bangladesh, 6 hours ahead of UTC.
- •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).
HST – Hawaii Standard Time
UTC-10:00Hawaii Standard Time (HST) is the time zone for the Hawaiian Islands, 10 hours behind UTC.
- •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).
BDST vs HST: Offsets, DST and Best Call Times
BDST runs on Bangladesh Standard Time (BDST) at UTC+06:00. HST runs on Hawaii Standard Time (HST) at UTC-10:00. That puts BDST 16 hours behind HST — a difference of -16h at the current offsets.
In practice, when it is 9:00 AM in BDST it is 5:00 PM in HST on the previous day. Midnight in BDST is 8:00 AM in HST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
BDST to HST time conversion table
| BDST (BDST) | HST (HST) | Day |
|---|---|---|
| 12:00 AM | 8:00 AM | previous day |
| 6:00 AM | 2:00 PM | previous day |
| 7:00 AM | 3:00 PM | previous day |
| 8:00 AM | 4:00 PM | previous day |
| 9:00 AM | 5:00 PM | previous day |
| 12:00 PM | 8:00 PM | previous day |
| 3:00 PM | 11:00 PM | previous day |
| 5:00 PM | 1:00 AM | same day |
| 6:00 PM | 2:00 AM | same day |
| 9:00 PM | 5:00 AM | same day |
Why people convert BDST to HST time
- Scheduling a call from BDST to HST: a 10:00 AM start in BDST lands at 6:00 PM in HST the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -16h gap: BDST and HST 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 HST is 5:00 PM in BDST.
- Keeping family and friends in sync: knowing that 8:00 PM in BDST is 4:00 AM in HST 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 -16h gap is not.
- With a -16h gap there is no shared 9-to-5 window, so alternate the early start: one week BDST takes the early slot, the next week HST does.
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 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.
Best time to call between BDST and HST
With a -16h offset there is no overlap inside a normal 9 AM – 5 PM day. HST opens at 9:00 AM HST, which is 5:00 PM in BDST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
BDST and HST have no shared working hours because of the -16h gap. Teams need to alternate early starts or rely on asynchronous handovers.
BDST is 16 hours behind HST (BDST UTC+06:00 → HST UTC-10:00). 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:
Frequently Asked Questions
What is the time difference between BDST and HST?
BDST (BDST, UTC+06:00) is 16 hours behind HST (HST, UTC-10:00). The gap is currently -16h.
How do I convert BDST time to HST time?
Add -16h to BDST local time. For example, 9:00 AM in BDST is 5:00 PM in HST (previous day).
What time is it in HST right now?
HST uses HST at UTC-10:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -16h offset from BDST.
What is the best time to call HST from BDST?
There is no shared working-hours window because of the -16h gap. The closest option is 1:00 PM in BDST, which is 9:00 PM in HST.
Which is behind, BDST or HST?
BDST is 16 hours behind HST. When it is 12:00 PM in BDST it is 8:00 PM in HST.
Does daylight saving time affect the BDST–HST difference?
Neither zone observes daylight saving time, so the -16h offset between BDST and HST 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 HST?
Sometimes. The -16h gap is large enough that 8:00 PM or later in BDST already falls on the in HST.
What is the time difference between BDST and HST?
HST is -16h from BDST.
What timezone is BDST in?
BDST operates on its local timezone.
What timezone is HST in?
HST 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.
Which cities are in the HST timezone?
Major cities in the HST timezone include Honolulu, Hilo, Kailua, Pearl City, Kapolei.
What is the UTC offset for HST?
Hawaii Standard Time (HST) is at UTC-10:00.
What should I know about the HST timezone?
Hawaii does not observe daylight saving time. HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
When is it midnight in BDST, what time is it in HST?
When it is 12:00 AM (midnight) in BDST (BDST), it is -16h later in HST (HST).
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- new york to bdst
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- tokyo to bdst
- singapore to bdst
- sydney to bdst
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- delhi to bdst
- mumbai to bdst
- berlin to bdst
- hong kong to bdst
- toronto to bdst
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See every conversion from BDST →·See every conversion from HST →