United Kingdom to COT
-6hUnited Kingdom
BSTSOURCECOT
COTGreen rows indicate typical business hours (9 AM - 5 PM)
BST and COT on the World Map
The map below highlights the BST (Greenwich Mean Time) and COT (Colombia Time) timezone regions across the globe.
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.
COT – Colombia Time
UTC-05:00Colombia Time (COT) is the standard time for Colombia, 5 hours behind UTC.
- •Colombia does not observe daylight saving time.
- •COT is the same offset as EST (UTC-05:00).
- •Bogotá sits at 2,640m elevation, making it one of the highest capital cities.
Understanding the -6h Gap: United Kingdom vs COT
United Kingdom runs on British Summer Time (BST) at UTC+01:00, currently observing daylight saving time. COT runs on Colombia Time (COT) at UTC-05:00. That puts United Kingdom 6 hours behind COT — a difference of -6h at the current offsets.
In practice, when it is 9:00 AM in United Kingdom it is 3:00 AM in COT. Midnight in United Kingdom is 6:00 PM in COT.United Kingdom observes daylight saving time while COT does not, so the gap narrows or widens by an hour part of the year.
United Kingdom to COT time conversion table
| United Kingdom (BST) | COT (COT) | 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 United Kingdom to COT time
- Scheduling a call from United Kingdom to COT: a 10:00 AM start in United Kingdom lands at 4:00 AM in COT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both United Kingdom and COT are inside the 9-to-5 working day between 3:00 PM and 5:00 PM BST time (9:00 AM–11:00 AM COT). That is roughly 2 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in United Kingdom is 2:00 PM in COT makes it easy to avoid calling at 3 AM.
- 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 United Kingdom and need COT colleagues present.
- United Kingdom: Clocks fall back on Sun, Oct 25, 2026. Re-check this page after that date because the offset changes and so does the -6h gap.
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.
About COT (Colombia Time)
Colombia Time (COT) is used throughout Colombia. Colombia does not observe daylight saving time. COT shares the same offset as EST (UTC-05:00). Bogotá, the capital, is one of the largest cities in South America.
Best time to call between United Kingdom and COT
Both United Kingdom and COT 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 COT. That gives roughly 2 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
United Kingdom and COT overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.
United Kingdom is 6 hours behind COT (BST UTC+01:00 → COT 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
United Kingdom
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
COT
Does not observe DST
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 United Kingdom and COT?
United Kingdom (BST, UTC+01:00) is 6 hours behind COT (COT, UTC-05:00). The gap is currently -6h.
How do I convert United Kingdom time to COT time?
Add -6h to United Kingdom local time. For example, 9:00 AM in United Kingdom is 3:00 AM in COT.
What time is it in COT right now?
COT uses COT 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 United Kingdom.
What is the best time to call COT from United Kingdom?
Call between 3:00 PM and 5:00 PM BST — that maps to 9:00 AM–11:00 AM COT and keeps both parties inside the working day.
Which is behind, United Kingdom or COT?
United Kingdom is 6 hours behind COT. When it is 12:00 PM in United Kingdom it is 6:00 AM in COT.
Do United Kingdom and COT use different time zones?
United Kingdom (United Kingdom) uses BST at UTC+01:00, while COT uses COT at UTC-05:00. The IANA identifiers are Europe/London and America/Bogota.
Does daylight saving time affect the United Kingdom–COT difference?
Yes at the moment: United Kingdom is on daylight saving time and COT is not, so the -6h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share United Kingdom's time zone?
BST also covers London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar and 5 more.
Which countries use BST, United Kingdom's zone?
BST is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, Mali, Mauritania and 7 more.
Is there a day difference between United Kingdom and COT?
Not normally. The -6h gap only pushes the date over the previous day.
What is the time difference between United Kingdom and COT?
COT is -6h from United Kingdom.
What timezone is United Kingdom in?
United Kingdom operates on its local timezone.
What timezone is COT in?
COT operates on its local timezone.
Which countries use GMT (Greenwich Mean Time)?
GMT is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, and 9 more countries.
Does GMT observe daylight saving time?
Yes, GMT switches to BST during summer months.
What are some interesting facts about GMT?
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.
Which cities are in the COT timezone?
Major cities in the COT timezone include Bogotá, Medellín, Cali, Barranquilla, Cartagena.
What is the UTC offset for COT?
Colombia Time (COT) is at UTC-05:00.
What should I know about the COT timezone?
Colombia does not observe daylight saving time. COT is the same offset as EST (UTC-05:00).
When is it midnight in United Kingdom, what time is it in COT?
When it is 12:00 AM (midnight) in United Kingdom (GMT), it is -6h later in COT (COT).
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