CDT to United Kingdom
+6hCDT
CDTSOURCEUnited Kingdom
BSTGreen rows indicate typical business hours (9 AM - 5 PM)
CDT and BST on the World Map
The map below highlights the CDT (Central Daylight Time) and BST (Greenwich Mean Time) timezone regions across the globe.
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.
GMT – Greenwich Mean Time
UTC+00:00Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.
- •GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
- •The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
- •GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
- •Iceland uses GMT year-round and never observes daylight saving time.
- •The UK switches from GMT to BST (British Summer Time) in late March each year.
CDT to United Kingdom Time Difference – Complete Guide
CDT runs on Central Daylight Time (CDT) at UTC-05:00. United Kingdom runs on British Summer Time (BST) at UTC+01:00, also currently on daylight saving time. That puts CDT 6 hours ahead of United Kingdom — a difference of +6h at the current offsets.
In practice, when it is 9:00 AM in CDT it is 3:00 PM in United Kingdom. Midnight in CDT is 6:00 AM in United Kingdom.United Kingdom observes daylight saving time while CDT does not, so the gap narrows or widens by an hour part of the year.
CDT to United Kingdom time conversion table
| CDT (CDT) | United Kingdom (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 CDT to United Kingdom time
- Scheduling a call from CDT to United Kingdom: a 10:00 AM start in CDT lands at 4:00 PM in United Kingdom, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both CDT and United Kingdom 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.
- Booking travel or deliveries: tracking United Kingdom local time against CDT keeps pickup windows and arrival estimates honest across the +6h offset.
- 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 CDT and need United Kingdom colleagues present.
- United Kingdom: Clocks fall back on Sun, Oct 25, 2026. Any meeting series spanning that date will shift by an hour in local time.
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.
About GMT (Greenwich Mean Time)
Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.
Best time to call between CDT and United Kingdom
Both CDT and United Kingdom 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
CDT and United Kingdom overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.
CDT is 6 hours ahead of United Kingdom (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
CDT
☀ Currently in DST
Standard: UTC-06:00 · DST: UTC-05:00
Clocks fall back on Sun, Nov 1, 2026
United Kingdom
☀ 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 CDT and United Kingdom?
CDT (CDT, UTC-05:00) is 6 hours ahead of United Kingdom (BST, UTC+01:00). The gap is currently +6h.
How do I convert CDT time to United Kingdom time?
Add +6h to CDT local time. For example, 9:00 AM in CDT is 3:00 PM in United Kingdom.
What time is it in United Kingdom right now?
United Kingdom 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 CDT.
What is the best time to call United Kingdom from CDT?
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, CDT or United Kingdom?
CDT is 6 hours ahead of United Kingdom. When it is 12:00 PM in CDT it is 6:00 PM in United Kingdom.
Do CDT and United Kingdom use different time zones?
CDT uses CDT at UTC-05:00, while United Kingdom (United Kingdom) uses BST at UTC+01:00. The IANA identifiers are America/Chicago and Europe/London.
Does daylight saving time affect the CDT–United Kingdom difference?
Yes at the moment: United Kingdom is on daylight saving time and CDT is not, so the +6h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share CDT's time zone?
CDT also covers Chicago, Houston, Dallas, Austin, Winnipeg, Nashville.
Which countries use CDT, CDT's zone?
CDT is used in United States (Central), Canada (Manitoba).
Is there a day difference between CDT and United Kingdom?
Not normally. The +6h gap only pushes the date over for late-evening times.
What is the time difference between CDT and United Kingdom?
United Kingdom is +6h from CDT.
What timezone is CDT in?
CDT operates on its local timezone.
What timezone is United Kingdom in?
United Kingdom operates on its local timezone.
Which countries use CDT (Central Daylight Time)?
CDT is used in United States (Central), Canada (Manitoba).
Does CDT observe daylight saving time?
Yes, CDT switches to CST during summer months.
What are some interesting facts about CDT?
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.
Which cities are in the GMT timezone?
Major cities in the GMT timezone include London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar.
What is the UTC offset for GMT?
Greenwich Mean Time (GMT) is at UTC+00:00. During daylight saving time, it shifts to BST.
What should I know about the GMT timezone?
GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
When is it midnight in CDT, what time is it in United Kingdom?
When it is 12:00 AM (midnight) in CDT (CDT), it is +6h later in United Kingdom (GMT).
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