JST to BDST
-3hJST
JSTSOURCEBDST
BDSTGreen rows indicate typical business hours (9 AM - 5 PM)
JST and BDST on the World Map
The map below highlights the JST (Japan Standard Time) and BDST (Bangladesh Standard Time) timezone regions across the globe.
JST – Japan Standard Time
UTC+09:00Japan Standard Time (JST) is the time zone for Japan, 9 hours ahead of UTC.
- •Japan does not observe daylight saving time.
- •Tokyo is the most populous metropolitan area in the world.
- •The Tokyo Stock Exchange operates from 9:00 AM to 3:00 PM JST.
- •JST is 14 hours ahead of EST and 9 hours ahead of GMT.
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).
JST vs BDST: Offsets, DST and Best Call Times
JST runs on Japan Standard Time (JST) at UTC+09:00. BDST runs on Bangladesh Standard Time (BDST) at UTC+06:00. That puts JST 3 hours behind BDST — a difference of -3h at the current offsets.
In practice, when it is 9:00 AM in JST it is 6:00 AM in BDST. Midnight in JST is 9:00 PM in BDST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
JST to BDST time conversion table
| JST (JST) | BDST (BDST) | Day |
|---|---|---|
| 12:00 AM | 9:00 PM | previous day |
| 6:00 AM | 3:00 AM | same day |
| 7:00 AM | 4:00 AM | same day |
| 8:00 AM | 5:00 AM | same day |
| 9:00 AM | 6:00 AM | same day |
| 12:00 PM | 9:00 AM | same day |
| 3:00 PM | 12:00 PM | same day |
| 5:00 PM | 2:00 PM | same day |
| 6:00 PM | 3:00 PM | same day |
| 9:00 PM | 6:00 PM | same day |
Why people convert JST to BDST time
- Scheduling a call from JST to BDST: a 10:00 AM start in JST lands at 7:00 AM in BDST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both JST and BDST are inside the 9-to-5 working day between 12:00 PM and 5:00 PM JST time (9:00 AM–2:00 PM BDST). That is roughly 5 hours of usable overlap.
- Booking travel or deliveries: tracking BDST local time against JST keeps pickup windows and arrival estimates honest across the -3h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM JST" is unambiguous; "3 PM" across a -3h gap is not.
- Block 12:00 PM–5:00 PM JST as the recurring meeting window if you work primarily from JST and need BDST colleagues present.
About JST (Japan Standard Time)
Japan Standard Time (JST) is the standard time zone for all of Japan. Japan does not observe daylight saving time. JST is 9 hours ahead of UTC and 14 hours ahead of EST. The Tokyo Stock Exchange, the world's third largest by market capitalization, operates on JST. South Korea uses the same offset (KST) but it is a distinct time zone.
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 JST and BDST
Both JST and BDST sit inside the 9 AM – 5 PM working day between 12:00 PM–5:00 PM JST, which is 9:00 AM–2:00 PM BDST. That gives roughly 5 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
JST and BDST share 5 hours of working-hours overlap (12:00 PM–5:00 PM JST), so scheduling a live meeting is straightforward.
JST is 3 hours behind BDST (JST UTC+09:00 → BDST UTC+06:00). The shared working window is 12:00 PM–5:00 PM JST. 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 JST and BDST?
JST (JST, UTC+09:00) is 3 hours behind BDST (BDST, UTC+06:00). The gap is currently -3h.
How do I convert JST time to BDST time?
Add -3h to JST local time. For example, 9:00 AM in JST is 6:00 AM in BDST.
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 -3h offset from JST.
What is the best time to call BDST from JST?
Call between 12:00 PM and 5:00 PM JST — that maps to 9:00 AM–2:00 PM BDST and keeps both parties inside the working day.
Which is behind, JST or BDST?
JST is 3 hours behind BDST. When it is 12:00 PM in JST it is 9:00 AM in BDST.
Does daylight saving time affect the JST–BDST difference?
Neither zone observes daylight saving time, so the -3h offset between JST and BDST is fixed all year.
Which other cities share JST's time zone?
JST also covers Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka and 1 more.
Which countries use JST, JST's zone?
JST is used in Japan.
Is there a day difference between JST and BDST?
Not normally. The -3h gap only pushes the date over the previous day.
What is the time difference between JST and BDST?
BDST is -3h from JST.
What timezone is JST in?
JST operates on its local timezone.
What timezone is BDST in?
BDST operates on its local timezone.
Which countries use JST (Japan Standard Time)?
JST is used in Japan.
Does JST observe daylight saving time?
No, JST does not observe daylight saving time and remains at UTC+09:00 year-round.
What are some interesting facts about JST?
Japan does not observe daylight saving time. Tokyo is the most populous metropolitan area in the world.
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 JST, what time is it in BDST?
When it is 12:00 AM (midnight) in JST (JST), it is -3h later in BDST (BDST).
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