CST to BST Time Converter
BST is 6 hours ahead of CST. The US Central states are currently on CDT (UTC-5:00), and BST is UTC+1:00.
Best Time to Call Between CST and BST
Both zones are inside normal business hours between 9:00 AM and 11:00 AM CST — that's 3:00 PM to 5:00 PM BST. That's a 2-hour window.
both at work CST only BST only neither — hours along the strip are CST.
Common Times Converted
CST on the left, BST on the right.
CST to BST: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| CST | BST | Working hours |
|---|---|---|
| 12:00 AM | 6:00 AM | — |
| 1:00 AM | 7:00 AM | — |
| 2:00 AM | 8:00 AM | — |
| 3:00 AM | 9:00 AM | BST only |
| 4:00 AM | 10:00 AM | BST only |
| 5:00 AM | 11:00 AM | BST only |
| 6:00 AM | 12:00 PM | BST only |
| 7:00 AM | 1:00 PM | BST only |
| 8:00 AM | 2:00 PM | BST only |
| 9:00 AM | 3:00 PM | Both zones |
| 10:00 AM | 4:00 PM | Both zones |
| 11:00 AM | 5:00 PM | CST only |
| 12:00 PM | 6:00 PM | CST only |
| 1:00 PM | 7:00 PM | CST only |
| 2:00 PM | 8:00 PM | CST only |
| 3:00 PM | 9:00 PM | CST only |
| 4:00 PM | 10:00 PM | CST only |
| 5:00 PM | 11:00 PM | — |
| 6:00 PM | 12:00 AM next day | — |
| 7:00 PM | 1:00 AM next day | — |
| 8:00 PM | 2:00 AM next day | — |
| 9:00 PM | 3:00 AM next day | — |
| 10:00 PM | 4:00 AM next day | — |
| 11:00 PM | 5:00 AM next day | — |
What CST and BST Actually Are
CST — Central Standard 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. CST also stands for China Standard Time (UTC+8) and Cuba Standard Time (UTC-5). This page covers the North American one.
Saskatchewan sits inside the Central zone but never changes its clocks, so it matches CST in winter and its neighbors' MDT in summer.
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
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 CST
Cities on BST
Frequently Asked Questions
What is the time difference between CST and BST?
BST is 6 hours ahead of CST. That is the live figure. Taken strictly as written, the gap between CST and BST is 7 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM CST in BST?
9:00 AM CST is 3:00 PM BST.
What are the best hours to schedule a call between CST and BST?
Between 9:00 AM and 11:00 AM CST, which is 3:00 PM to 5:00 PM BST. Both sides are inside normal business hours through that window.
Does the difference between CST and BST 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, November 1, 2026.
Does CST always mean Central Standard Time?
CST also stands for China Standard Time (UTC+8) and Cuba Standard Time (UTC-5). This page covers the North American one.
Does BST always mean British Summer Time?
BST also stands for Bangladesh Standard Time (UTC+6). BDT is the clearer label for that one.