Chicago to BST
+6hChicago
CDTSOURCEBST
BSTGreen rows indicate typical business hours (9 AM - 5 PM)
CDT and BST on the World Map
The map below highlights the CDT (Central Standard Time) and BST (British Summer Time) timezone regions across the globe.
CST – Central Standard Time
UTC-06:00Central Standard Time (CST) is the time zone for the central United States, Canada, and Mexico, 6 hours behind UTC.
- •CST covers 20 US states fully or partially.
- •Chicago and Houston are the two largest cities in the Central Time Zone.
- •Mexico City, one of the world's most populous cities, operates on CST.
- •CST is 1 hour behind EST and 2 hours ahead of PST.
BST – British Summer Time
UTC+01:00British Summer Time (BST, UTC+01:00) is the daylight saving period in the United Kingdom, running from late March to late October.
- •BST runs from the last Sunday in March to the last Sunday in October.
- •BST is exactly one hour ahead of GMT, the UK's standard time.
- •During BST, London is 4 hours ahead of New York while the US is on Eastern Daylight Time.
- •The Isle of Man and the Channel Islands also observe BST.
About Chicago
WikipediaChicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.
The Chicago Board of Trade is the world's oldest futures and options exchange.
Chicago to BST Time Difference – Complete Guide
Chicago runs on Central Daylight Time (CDT) at UTC-05:00, currently observing daylight saving time. BST runs on British Summer Time (BST) at UTC+01:00. That puts Chicago 6 hours ahead of BST — a difference of +6h at the current offsets.
In practice, when it is 9:00 AM in Chicago it is 3:00 PM in BST. Midnight in Chicago is 6:00 AM in BST.Chicago observes daylight saving time while BST does not, so the gap narrows or widens by an hour part of the year.
Chicago to BST time conversion table
| Chicago (CDT) | BST (BST) | Day |
|---|---|---|
| 12:00 AM | 6:00 AM | same day |
| 6:00 AM | 12:00 PM | same day |
| 7:00 AM | 1:00 PM | same day |
| 8:00 AM | 2:00 PM | same day |
| 9:00 AM | 3:00 PM | same day |
| 12:00 PM | 6:00 PM | same day |
| 3:00 PM | 9:00 PM | same day |
| 5:00 PM | 11:00 PM | same day |
| 6:00 PM | 12:00 AM | next day |
| 9:00 PM | 3:00 AM | next day |
Why people convert Chicago to BST time
- Scheduling a call from Chicago to BST: a 10:00 AM start in Chicago lands at 4:00 PM in BST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Chicago and BST are inside the 9-to-5 working day between 9:00 AM and 11:00 AM CDT time (3:00 PM–5:00 PM BST). That is roughly 2 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in Chicago is 2:00 AM in BST makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM CDT" is unambiguous; "3 PM" across a +6h gap is not.
- Block 9:00 AM–11:00 AM CDT as the recurring meeting window if you work primarily from Chicago and need BST colleagues present.
- Chicago: Clocks fall back on Sun, Nov 1, 2026. Re-check this page after that date because the offset changes and so does the +6h gap.
About CST (Central Standard Time)
Central Standard Time (CST) covers the central region of North America. It is the second most populous time zone in the US, including major cities like Chicago, Houston, and Dallas. CST is also used in Mexico City and much of Central America including Guatemala, Honduras, El Salvador, and Costa Rica. During summer, most of the US and Canada switch to Central Daylight Time (CDT, UTC-05:00), while Mexico and Central American countries generally remain on CST.
About BST (British Summer Time)
British Summer Time (BST) is the daylight saving period in the United Kingdom, when clocks move one hour forward from Greenwich Mean Time (GMT, UTC+00:00) to UTC+01:00. It runs from the last Sunday in March to the last Sunday in October. England, Scotland, Wales and Northern Ireland all follow it, along with the Isle of Man and the Channel Islands of Jersey and Guernsey. During BST, London is one hour ahead of UTC, four hours ahead of New York on Eastern Daylight Time, and five hours ahead of New York once the United States returns to Eastern Standard Time in November. BST is also used to abbreviate Bangladesh Standard Time (UTC+06:00), which is listed separately on this site.
Best time to call between Chicago and BST
Both Chicago and BST sit inside the 9 AM – 5 PM working day between 9:00 AM–11:00 AM CDT, which is 3:00 PM–5:00 PM BST. That gives roughly 2 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Chicago and BST overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.
Chicago is 6 hours ahead of BST (CDT UTC-05:00 → BST UTC+01:00). The shared working window is 9:00 AM–11:00 AM CDT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Chicago
☀ Currently in DST
Standard: UTC-06:00 · DST: UTC-05:00
Clocks fall back on Sun, Nov 1, 2026
BST
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between Chicago and BST?
Chicago (CDT, UTC-05:00) is 6 hours ahead of BST (BST, UTC+01:00). The gap is currently +6h.
How do I convert Chicago time to BST time?
Add +6h to Chicago local time. For example, 9:00 AM in Chicago is 3:00 PM in BST.
What time is it in BST right now?
BST uses BST at UTC+01:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +6h offset from Chicago.
What is the best time to call BST from Chicago?
Call between 9:00 AM and 11:00 AM CDT — that maps to 3:00 PM–5:00 PM BST and keeps both parties inside the working day.
Which is ahead, Chicago or BST?
Chicago is 6 hours ahead of BST. When it is 12:00 PM in Chicago it is 6:00 PM in BST.
Do Chicago and BST use different time zones?
Chicago (USA) uses CDT at UTC-05:00, while BST uses BST at UTC+01:00. The IANA identifiers are America/Chicago and Europe/London.
Does daylight saving time affect the Chicago–BST difference?
Yes at the moment: Chicago is on daylight saving time and BST is not, so the +6h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share Chicago's time zone?
CDT also covers Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis and 6 more.
Which countries use CDT, Chicago's zone?
CDT is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, Costa Rica, Nicaragua and 1 more.
Is there a day difference between Chicago and BST?
Not normally. The +6h gap only pushes the date over for late-evening times.
What is the time difference between Chicago and BST?
BST is +6h from Chicago.
What timezone is Chicago in?
Chicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.
What timezone is BST in?
BST operates on its local timezone.
What are the business hours in Chicago?
Standard business hours in Chicago are 8:00 AM - 5:00 PM CST.
Which countries use CST (Central Standard Time)?
CST is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, and 3 more countries.
Does CST observe daylight saving time?
Yes, CST switches to CDT during summer months.
What are some interesting facts about CST?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
Which cities are in the BST timezone?
Major cities in the BST timezone include London, Birmingham, Manchester, Glasgow, Edinburgh, Cardiff, Belfast, Liverpool.
What is the UTC offset for BST?
British Summer Time (BST) is at UTC+01:00. During daylight saving time, it shifts to BST.
What should I know about the BST timezone?
BST runs from the last Sunday in March to the last Sunday in October. BST is exactly one hour ahead of GMT, the UK's standard time.
When is it midnight in Chicago, what time is it in BST?
When it is 12:00 AM (midnight) in Chicago (CST), it is +6h later in BST (BST).
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