BDT to BST Time Converter
BST is 5 hours behind BDT. BDT is UTC+6:00, and BST is UTC+1:00.
Best Time to Call Between BDT and BST
Both zones are inside normal business hours between 2:00 PM and 5:00 PM BDT — that's 9:00 AM to 12:00 PM BST. That's a 3-hour window.
both at work BDT only BST only neither — hours along the strip are BDT.
Common Times Converted
BDT on the left, BST on the right.
BDT to BST: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| BDT | BST | Working hours |
|---|---|---|
| 12:00 AM | 7:00 PM prev day | — |
| 1:00 AM | 8:00 PM prev day | — |
| 2:00 AM | 9:00 PM prev day | — |
| 3:00 AM | 10:00 PM prev day | — |
| 4:00 AM | 11:00 PM prev day | — |
| 5:00 AM | 12:00 AM | — |
| 6:00 AM | 1:00 AM | — |
| 7:00 AM | 2:00 AM | — |
| 8:00 AM | 3:00 AM | — |
| 9:00 AM | 4:00 AM | BDT only |
| 10:00 AM | 5:00 AM | BDT only |
| 11:00 AM | 6:00 AM | BDT only |
| 12:00 PM | 7:00 AM | BDT only |
| 1:00 PM | 8:00 AM | BDT only |
| 2:00 PM | 9:00 AM | Both zones |
| 3:00 PM | 10:00 AM | Both zones |
| 4:00 PM | 11:00 AM | Both zones |
| 5:00 PM | 12:00 PM | BST only |
| 6:00 PM | 1:00 PM | BST only |
| 7:00 PM | 2:00 PM | BST only |
| 8:00 PM | 3:00 PM | BST only |
| 9:00 PM | 4:00 PM | BST only |
| 10:00 PM | 5:00 PM | — |
| 11:00 PM | 6:00 PM | — |
What BDT and BST Actually Are
BDT — Bangladesh Standard Time
Dhaka, Chattogram, Khulna. Standing at UTC+6:00 as written, and the region does not change its clocks, so that offset holds all year. Sometimes written BST, which collides with British Summer Time.
Bangladesh experimented with daylight saving for a single year in 2009 during a power crisis, then abandoned it.
BST — British Summer Time
London, Manchester, Birmingham, Glasgow, and the rest of the UK from late March to late October. Standing at UTC+1:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, October 25, 2026, to GMT. BST also stands for Bangladesh Standard Time (UTC+6). BDT is the clearer label for that one.
British Summer Time began in 1916 as a wartime fuel-saving measure and has run every year since, making it one of the oldest continuous daylight saving schemes in the world.
What This Means in Practice
This gap is not fixed
BST changes its clocks and BDT does not, so the difference between them moves by an hour twice a year. A recurring meeting set now will drift for one side from Sunday, October 25, 2026 unless someone resets it.
Major Cities in Each Zone
Cities on BDT
Cities on BST
Frequently Asked Questions
What is the time difference between BDT and BST?
BST is 5 hours behind BDT.
What is 9:00 AM BDT in BST?
9:00 AM BDT is 4:00 AM BST.
What are the best hours to schedule a call between BDT and BST?
Between 2:00 PM and 5:00 PM BDT, which is 9:00 AM to 12:00 PM BST. Both sides are inside normal business hours through that window.
Does the difference between BDT and BST change during the year?
Yes. BST observes daylight saving and BDT does not, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, October 25, 2026.
Does BDT always mean Bangladesh Standard Time?
Sometimes written BST, which collides with British Summer Time.
Does BST always mean British Summer Time?
BST also stands for Bangladesh Standard Time (UTC+6). BDT is the clearer label for that one.