BST to CT Time Converter
CT is 6 hours behind BST. BST is UTC+1:00, and The US Central states are currently on CDT (UTC-5:00).
Best Time to Call Between BST and CT
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 CT. That's a 2-hour window.
both at work BST only CT only neither — hours along the strip are BST.
Common Times Converted
BST on the left, CT on the right.
BST to CT: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| BST | CT | 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 | CT only |
| 6:00 PM | 12:00 PM | CT only |
| 7:00 PM | 1:00 PM | CT only |
| 8:00 PM | 2:00 PM | CT only |
| 9:00 PM | 3:00 PM | CT only |
| 10:00 PM | 4:00 PM | CT only |
| 11:00 PM | 5:00 PM | — |
What BST and CT 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.
CT — Central Time
Chicago, Houston, Dallas, Mexico City, Winnipeg. Standing at UTC-6:00 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.
Central Time is the widest US zone by land area, stretching from the Gulf coast to the Canadian border, and it also covers Mexico City.
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 CT
Frequently Asked Questions
What is the time difference between BST and CT?
CT is 6 hours behind BST. That is the live figure. Taken strictly as written, the gap between BST and CT is 7 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM BST in CT?
9:00 AM BST is 3:00 AM CT.
What are the best hours to schedule a call between BST and CT?
Between 3:00 PM and 5:00 PM BST, which is 9:00 AM to 11:00 AM CT. Both sides are inside normal business hours through that window.
Does the difference between BST and CT 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.