BST to BDT Time Converter

Common Times Converted

BST on the left, BDT on the right.

BST to BDT: Full 24-Hour Conversion Table

Shaded rows are working hours; the darker shade marks the hours when both zones are at work.

What BST and BDT Actually Are

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.

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.

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 BST

Cities on BDT