BST to CDT
-6hBST
BSTSOURCECDT
CDTGreen rows indicate typical business hours (9 AM - 5 PM)
BST and CDT on the World Map
The map below highlights the BST (British Summer Time) and CDT (Central Daylight Time) timezone regions across the globe.
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.
CDT – Central Daylight Time
UTC-05:00Central Daylight Time (CDT) is the daylight saving offset in the Central Time Zone, 5 hours behind UTC.
- •CDT is the same offset as EST (UTC-05:00), which can cause confusion.
- •CDT runs from the second Sunday in March to the first Sunday in November.
Understanding the -6h Gap: BST vs CDT
BST runs on British Summer Time (BST) at UTC+01:00. CDT runs on Central Daylight Time (CDT) at UTC-05:00. That puts BST 6 hours behind CDT — a difference of -6h at the current offsets.
In practice, when it is 9:00 AM in BST it is 3:00 AM in CDT. Midnight in BST is 6:00 PM in CDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
BST to CDT time conversion table
| BST (BST) | CDT (CDT) | Day |
|---|---|---|
| 12:00 AM | 6:00 PM | previous day |
| 6:00 AM | 12:00 AM | same day |
| 7:00 AM | 1:00 AM | same day |
| 8:00 AM | 2:00 AM | same day |
| 9:00 AM | 3:00 AM | same day |
| 12:00 PM | 6:00 AM | same day |
| 3:00 PM | 9:00 AM | same day |
| 5:00 PM | 11:00 AM | same day |
| 6:00 PM | 12:00 PM | same day |
| 9:00 PM | 3:00 PM | same day |
Why people convert BST to CDT time
- Scheduling a call from BST to CDT: a 10:00 AM start in BST lands at 4:00 AM in CDT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both BST and CDT are inside the 9-to-5 working day between 3:00 PM and 5:00 PM BST time (9:00 AM–11:00 AM CDT). That is roughly 2 hours of usable overlap.
- Booking travel or deliveries: tracking CDT local time against BST keeps pickup windows and arrival estimates honest across the -6h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM BST" is unambiguous; "3 PM" across a -6h gap is not.
- Block 3:00 PM–5:00 PM BST as the recurring meeting window if you work primarily from BST and need CDT colleagues present.
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.
About CDT (Central Daylight Time)
Central Daylight Time (CDT) is observed during summer months in the US and Canadian portions of the Central Time Zone. Clocks are moved forward by one hour, aligning with Eastern Standard Time (EST). Most of Mexico and Central America do not observe CDT, staying on CST year-round.
Best time to call between BST and CDT
Both BST and CDT sit inside the 9 AM – 5 PM working day between 3:00 PM–5:00 PM BST, which is 9:00 AM–11:00 AM CDT. That gives roughly 2 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
BST and CDT overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.
BST is 6 hours behind CDT (BST UTC+01:00 → CDT UTC-05:00). The shared working window is 3:00 PM–5:00 PM BST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
BST
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
CDT
☀ Currently in DST
Standard: UTC-06:00 · DST: UTC-05:00
Clocks fall back on Sun, Nov 1, 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 BST and CDT?
BST (BST, UTC+01:00) is 6 hours behind CDT (CDT, UTC-05:00). The gap is currently -6h.
How do I convert BST time to CDT time?
Add -6h to BST local time. For example, 9:00 AM in BST is 3:00 AM in CDT.
What time is it in CDT right now?
CDT uses CDT at UTC-05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -6h offset from BST.
What is the best time to call CDT from BST?
Call between 3:00 PM and 5:00 PM BST — that maps to 9:00 AM–11:00 AM CDT and keeps both parties inside the working day.
Which is behind, BST or CDT?
BST is 6 hours behind CDT. When it is 12:00 PM in BST it is 6:00 AM in CDT.
Does daylight saving time affect the BST–CDT difference?
Neither zone observes daylight saving time, so the -6h offset between BST and CDT is fixed all year.
Which other cities share BST's time zone?
BST also covers London, Birmingham, Manchester, Glasgow, Edinburgh, Cardiff, Belfast, Liverpool and 2 more.
Which countries use BST, BST's zone?
BST is used in United Kingdom.
Is there a day difference between BST and CDT?
Not normally. The -6h gap only pushes the date over the previous day.
What is the time difference between BST and CDT?
CDT is -6h from BST.
What timezone is BST in?
BST operates on its local timezone.
What timezone is CDT in?
CDT operates on its local timezone.
Which countries use BST (British Summer Time)?
BST is used in United Kingdom.
Does BST observe daylight saving time?
Yes, BST switches to BST during summer months.
What are some interesting facts about BST?
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.
Which cities are in the CDT timezone?
Major cities in the CDT timezone include Chicago, Houston, Dallas, Austin, Winnipeg, Nashville.
What is the UTC offset for CDT?
Central Daylight Time (CDT) is at UTC-05:00. During daylight saving time, it shifts to CST.
What should I know about the CDT timezone?
CDT is the same offset as EST (UTC-05:00), which can cause confusion. CDT runs from the second Sunday in March to the first Sunday in November.
When is it midnight in BST, what time is it in CDT?
When it is 12:00 AM (midnight) in BST (BST), it is -6h later in CDT (CDT).
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See every conversion from BST →·See every conversion from CDT →