BST to CDT Time Converter
CDT is 6 hours behind BST. BST is UTC+1:00, and CDT is UTC-5:00.
Best Time to Call Between BST and CDT
Both zones are inside normal business hours between 3:00 PM and 5:00 PM BST — that's 9:00 AM to 11:00 AM CDT. That's a 2-hour window.
both at work BST only CDT only neither — hours along the strip are BST.
Common Times Converted
BST on the left, CDT on the right.
BST to CDT: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| BST | CDT | Working hours |
|---|---|---|
| 12:00 AM | 6:00 PM prev day | — |
| 1:00 AM | 7:00 PM prev day | — |
| 2:00 AM | 8:00 PM prev day | — |
| 3:00 AM | 9:00 PM prev day | — |
| 4:00 AM | 10:00 PM prev day | — |
| 5:00 AM | 11:00 PM prev day | — |
| 6:00 AM | 12:00 AM | — |
| 7:00 AM | 1:00 AM | — |
| 8:00 AM | 2:00 AM | — |
| 9:00 AM | 3:00 AM | BST only |
| 10:00 AM | 4:00 AM | BST only |
| 11:00 AM | 5:00 AM | BST only |
| 12:00 PM | 6:00 AM | BST only |
| 1:00 PM | 7:00 AM | BST only |
| 2:00 PM | 8:00 AM | BST only |
| 3:00 PM | 9:00 AM | Both zones |
| 4:00 PM | 10:00 AM | Both zones |
| 5:00 PM | 11:00 AM | CDT only |
| 6:00 PM | 12:00 PM | CDT only |
| 7:00 PM | 1:00 PM | CDT only |
| 8:00 PM | 2:00 PM | CDT only |
| 9:00 PM | 3:00 PM | CDT only |
| 10:00 PM | 4:00 PM | CDT only |
| 11:00 PM | 5:00 PM | — |
What BST and CDT 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.
CDT — Central Daylight Time
Chicago, Houston, Dallas, Winnipeg. Standing at UTC-5:00 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, November 1, 2026, to CST. Mexico abolished daylight saving in 2022, so Mexico City stays on UTC-6 all year and no longer uses CDT.
Mexico left this pattern behind in 2022, abolishing daylight saving nationwide except in a strip of cities along the US border that kept it for cross-frontier trade.
What This Means in Practice
Both sides change clocks, on different dates
Both regions observe daylight saving but do not switch on the same day, so for a week or two each spring and fall the gap between them is an hour different from the rest of the year. Those short windows are where recurring invitations quietly break.
Major Cities in Each Zone
Cities on BST
Cities on CDT
Frequently Asked Questions
What is the time difference between BST and CDT?
CDT is 6 hours behind BST.
What is 9:00 AM BST in CDT?
9:00 AM BST is 3:00 AM CDT.
What are the best hours to schedule a call between BST and CDT?
Between 3:00 PM and 5:00 PM BST, which is 9:00 AM to 11:00 AM CDT. Both sides are inside normal business hours through that window.
Does the difference between BST and CDT change during the year?
Yes. Both regions observe daylight saving, and they do not switch on the same dates, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, October 25, 2026.
Does BST always mean British Summer Time?
BST also stands for Bangladesh Standard Time (UTC+6). BDT is the clearer label for that one.
Does CDT always mean Central Daylight Time?
Mexico abolished daylight saving in 2022, so Mexico City stays on UTC-6 all year and no longer uses CDT.