ACST to Dhaka
-3h 30mACST
ACSTSOURCEDhaka
BDSTGreen rows indicate typical business hours (9 AM - 5 PM)
ACST and BDST on the World Map
The map below highlights the ACST (Australian Central Standard Time) and BDST (Bangladesh Standard Time) timezone regions across the globe.
ACST – Australian Central Standard Time
UTC+09:30Australian Central Standard Time (ACST, UTC+09:30) covers South Australia and the Northern Territory, on a half-hour offset.
- •ACST uses a half-hour offset: UTC+09:30.
- •South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
- •Adelaide and Darwin are 30 minutes apart during daylight saving, level in winter.
- •Adelaide is one of the few major cities on a 30-minute offset.
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).
About Dhaka
WikipediaDhaka operates on Bangladesh Standard Time (BST), UTC+6. As the world's second-largest garment hub, Dhaka time coordinates global fashion supply chains.
Bangladesh is the world's second-largest garment exporter after China.
Time Conversion Guide: ACST to Dhaka
ACST runs on Australian Central Standard Time (ACST) at UTC+09:30. Dhaka runs on Bangladesh Standard Time (BDST) at UTC+06:00. That puts ACST 3 hours 30 minutes behind Dhaka — a difference of -3h 30m at the current offsets.
In practice, when it is 9:00 AM in ACST it is 5:30 AM in Dhaka. Midnight in ACST is 8:30 PM in Dhaka. Neither zone observes daylight saving time, so the offset between them stays constant all year.
ACST to Dhaka time conversion table
| ACST (ACST) | Dhaka (BDST) | Day |
|---|---|---|
| 12:00 AM | 8:30 PM | previous day |
| 6:00 AM | 2:30 AM | same day |
| 7:00 AM | 3:30 AM | same day |
| 8:00 AM | 4:30 AM | same day |
| 9:00 AM | 5:30 AM | same day |
| 12:00 PM | 8:30 AM | same day |
| 3:00 PM | 11:30 AM | same day |
| 5:00 PM | 1:30 PM | same day |
| 6:00 PM | 2:30 PM | same day |
| 9:00 PM | 5:30 PM | same day |
Why people convert ACST to Dhaka time
- Scheduling a call from ACST to Dhaka: a 10:00 AM start in ACST lands at 6:30 AM in Dhaka, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both ACST and Dhaka are inside the 9-to-5 working day between 12:30 PM and 5:00 PM ACST time (9:00 AM–1:30 PM BDST). That is roughly 4 hours 30 minutes of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in ACST is 4:30 PM in Dhaka makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM ACST" is unambiguous; "3 PM" across a -3h 30m gap is not.
- Block 12:30 PM–5:00 PM ACST as the recurring meeting window if you work primarily from ACST and need Dhaka colleagues present.
About ACST (Australian Central Standard Time)
Australian Central Standard Time (ACST) is the half-hour offset of UTC+09:30 used across South Australia and the Northern Territory, taking in Adelaide and Darwin. South Australia moves to Australian Central Daylight Time (ACDT, UTC+10:30) from the first Sunday in October to the first Sunday in April, but the Northern Territory does not observe daylight saving — so Adelaide and Darwin sit 30 minutes apart in summer and level with each other in winter. The half-hour offset means Adelaide is 30 minutes behind Sydney in winter and level with it during daylight saving, which regularly catches out travellers and meeting planners.
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 ACST and Dhaka
Both ACST and Dhaka sit inside the 9 AM – 5 PM working day between 12:30 PM–5:00 PM ACST, which is 9:00 AM–1:30 PM BDST. That gives roughly 4 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
ACST and Dhaka overlap for about 4 hours during the working day — enough for meetings if you avoid the edges of the window.
ACST is 3 hours 30 minutes behind Dhaka (ACST UTC+09:30 → BDST UTC+06:00). The shared working window is 12:30 PM–5:00 PM ACST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
ACST
❄ Currently in Standard Time
Standard: UTC+09:30 · DST: UTC+10:30
Clocks spring forward on Sat, Oct 3, 2026
Dhaka
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:
Frequently Asked Questions
What is the time difference between ACST and Dhaka?
ACST (ACST, UTC+09:30) is 3 hours 30 minutes behind Dhaka (BDST, UTC+06:00). The gap is currently -3h 30m.
How do I convert ACST time to Dhaka time?
Add -3h 30m to ACST local time. For example, 9:00 AM in ACST is 5:30 AM in Dhaka.
What time is it in Dhaka right now?
Dhaka 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 -3h 30m offset from ACST.
What is the best time to call Dhaka from ACST?
Call between 12:30 PM and 5:00 PM ACST — that maps to 9:00 AM–1:30 PM BDST and keeps both parties inside the working day.
Which is behind, ACST or Dhaka?
ACST is 3 hours 30 minutes behind Dhaka. When it is 12:00 PM in ACST it is 8:30 AM in Dhaka.
Do ACST and Dhaka use different time zones?
ACST uses ACST at UTC+09:30, while Dhaka (Bangladesh) uses BDST at UTC+06:00. The IANA identifiers are Australia/Adelaide and Asia/Dhaka.
Does daylight saving time affect the ACST–Dhaka difference?
Neither zone observes daylight saving time, so the -3h 30m offset between ACST and Dhaka is fixed all year.
Which other cities share ACST's time zone?
ACST also covers Adelaide, Darwin, Alice Springs, Mount Gambier.
Which countries use ACST, ACST's zone?
ACST is used in Australia (South Australia, Northern Territory).
Is there a day difference between ACST and Dhaka?
Not normally. The -3h 30m gap only pushes the date over the previous day.
What is the time difference between ACST and Dhaka?
Dhaka is -3h 30m from ACST.
What timezone is ACST in?
ACST operates on its local timezone.
What timezone is Dhaka in?
Dhaka operates on Bangladesh Standard Time (BST), UTC+6. As the world's second-largest garment hub, Dhaka time coordinates global fashion supply chains.
What are the business hours in Dhaka?
Standard business hours in Dhaka are 9:00 AM - 5:00 PM BST.
Which countries use ACST (Australian Central Standard Time)?
ACST is used in Australia (South Australia, Northern Territory).
Does ACST observe daylight saving time?
Yes, ACST switches to ACDT during summer months.
What are some interesting facts about ACST?
ACST uses a half-hour offset: UTC+09:30. South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
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.
When is it midnight in ACST, what time is it in Dhaka?
When it is 12:00 AM (midnight) in ACST (ACST), it is -3h 30m later in Dhaka (BDST).
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