BST to CST converter
When it's 9:00 am in London, it's 3:00 am in Chicago. Only 2 hours of your working days overlap, so the meeting slot is worth picking with care.
Convert British Summer Time (BST) to Central Standard Time (CST) for any date and time.
Central Time is 6 hours behind UK time for most of the year.
Right now BST is UTC+1 and Central Time is on CDT (UTC−5). UK time switches back to standard time on 25 October 2026.
UK clocks go back on 25 October 2026. From then, CST is 5 hours behind BST.
9:00 am to 5:00 pm BST is 3:00 am to 11:00 am CDT.
- 8:00 am BST is 2:00 am CDT
- 9:00 am BST is 3:00 am CDT
- 10:00 am BST is 4:00 am CDT
- 12:00 pm BST is 6:00 am CDT
- 3:00 pm BST is 9:00 am CDT
- 5:00 pm BST is 11:00 am CDT
Hours in UK time, Fri, Oct 23
UK time
United Kingdom
Fri, Oct 23
BST · UTC+1ReferenceWorking hoursCentral Time
US, Canada & Mexico
Fri, Oct 23
CDT · UTC−5−6h from UK timeOutside working hours
Best time to meet: 3:00 PM–5:00 PM in UK time on Fri, Oct 23, when everyone is inside working hours.
Book a meeting in this windowWorking hours: 9:00 AM–5:00 PM, Monday to FridayEveryone at work
BST to CST conversion table
Every hour of the day in BST, converted to CDT. Shaded cells are working hours (9:00 am to 5:00 pm); green rows are working hours in both zones.
| BST | CDTUntil 25 October 2026; 1 November 2026 to 14 March 2027; From 28 March 2027 | CDT25 October 2026 to 1 November 2026; 14 March 2027 to 28 March 2027 |
|---|---|---|
| 12:00 am BST | 6:00 pm CDT(day before) | 7:00 pm CDT(day before) |
| 1:00 am BST | 7:00 pm CDT(day before) | 8:00 pm CDT(day before) |
| 2:00 am BST | 8:00 pm CDT(day before) | 9:00 pm CDT(day before) |
| 3:00 am BST | 9:00 pm CDT(day before) | 10:00 pm CDT(day before) |
| 4:00 am BST | 10:00 pm CDT(day before) | 11:00 pm CDT(day before) |
| 5:00 am BST | 11:00 pm CDT(day before) | 12:00 am CDT |
| 6:00 am BST | 12:00 am CDT | 1:00 am CDT |
| 7:00 am BST | 1:00 am CDT | 2:00 am CDT |
| 8:00 am BST | 2:00 am CDT | 3:00 am CDT |
| 9:00 am BST | 3:00 am CDT | 4:00 am CDT |
| 10:00 am BST | 4:00 am CDT | 5:00 am CDT |
| 11:00 am BST | 5:00 am CDT | 6:00 am CDT |
| 12:00 pm BST | 6:00 am CDT | 7:00 am CDT |
| 1:00 pm BST | 7:00 am CDT | 8:00 am CDT |
| 2:00 pm BST | 8:00 am CDT | 9:00 am CDT |
| 3:00 pm BST | 9:00 am CDT | 10:00 am CDT |
| 4:00 pm BST | 10:00 am CDT | 11:00 am CDT |
| 5:00 pm BST | 11:00 am CDT | 12:00 pm CDT |
| 6:00 pm BST | 12:00 pm CDT | 1:00 pm CDT |
| 7:00 pm BST | 1:00 pm CDT | 2:00 pm CDT |
| 8:00 pm BST | 2:00 pm CDT | 3:00 pm CDT |
| 9:00 pm BST | 3:00 pm CDT | 4:00 pm CDT |
| 10:00 pm BST | 4:00 pm CDT | 5:00 pm CDT |
| 11:00 pm BST | 5:00 pm CDT | 6:00 pm CDT |
Best times to meet
Your working hours overlap for 2 hours, from 3:00 pm BST (9:00 am CDT) to 5:00 pm BST (11:00 am CDT). That's the best window for a meeting.
About these time zones
BST: British Summer Time
British Summer Time is UTC+1. BST is also used for Bangladesh Standard Time (UTC+6). This page converts UK time.
The United Kingdom from the last Sunday in March to the last Sunday in October. The rest of the year the UK is on GMT (UTC+0).
CST: Central Standard Time
Central Standard Time is UTC−6. CST is also used for China Standard Time (UTC+8) and Cuba Standard Time (UTC−5). This page converts North American Central Time.
Texas, Illinois, Minnesota, Louisiana and most of the Midwest and South, plus Manitoba in Canada. Saskatchewan and most of Mexico stay on CST all year. CT is the short form for the whole zone.
Most places on Central Time are on CDT (UTC−5) right now, not CST. People still say "CST" all year, so the times on this page follow the clocks and show CDT until 1 November 2026.
How the difference changes
Right now CDT is 6 hours behind BST. From 25 October 2026, when UK clocks go back, the difference becomes 5 hours. From 1 November 2026, when US clocks go back, the difference becomes 6 hours. From 14 March 2027, when US clocks go forward, the difference becomes 5 hours. From 28 March 2027, when UK clocks go forward, the difference becomes 6 hours.