BST to COT Converter
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Selected conversion
12:00 pm12:00 GMT (UTC+0), Nov 13, 2026 = 7:00 am07:00 COT (UTC-5), Nov 13, 2026
GMT is 5 hours ahead of COT.
BST and COT examples
These examples always use BST (UTC+1) and COT (UTC-5). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
BST is 6 hours ahead of COT.
How the time difference changes
For most of the year, BST is 6 hours ahead of COT. From Oct 25, 2026 to Mar 28, 2027, and from Oct 31, 2027 to Mar 26, 2028, GMT is 5 hours ahead of COT.
For most of the year, working hours of 9:00 am to 6:00 pm in BST correspond to 3:00 am to 12:00 pm in COT. At other times of the year, working hours of 9:00 am to 6:00 pm in GMT correspond to 4:00 am to 1:00 pm in COT.For most of the year, working hours of 09:00 to 18:00 in BST correspond to 03:00 to 12:00 in COT. At other times of the year, working hours of 09:00 to 18:00 in GMT correspond to 04:00 to 13:00 in COT.
Compare BST time with COT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Greenwich Mean Time is 5 hours ahead of Colombia Time.
12:00 pm12:00 in GMT is 7:00 am07:00 in COT
GMT to COT call time
Best time for a conference call or a meeting is between 2pm-6pm14:00-18:00 in GMT which corresponds to 9am-1pm09:00-13:00 in COT.
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
7:00 am07:00 Colombia Time (COT). Offset UTC -5:00 hours
12:00 pm12:00 GMT / 7:00 am07:00 COT
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
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British Summer Time
Offset: BST is 1 hour ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Guernsey, Isle of Man, Jersey, United Kingdom
Principal Cities: The largest city in the BST time zone is London in the United Kingdom, with about 8.962 million people. Other major cities in this time zone include Birmingham, Glasgow, Manchester, Sheffield.
Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, and in casual use the two are the same. In the military, GMT is known as Zulu time. Greenwich Mean Time was the same as Universal Time (UT), a standard astronomical concept used in many technical fields, until the introduction of UTC in 1972.
Current time in the United Kingdom: UK time now
Today the shaded areas are on UTC+0 (GMT).
BST representations, usage and related time zones
- +01 - basic short
- +0100 - basic
- +01:00 - extended
- +0100 - sign character (+) followed by a four digit time providing hours (01) and minutes (00) of the offset. Indicates an offset of one hour to the east of the zero meridian.
- Alpha - Military abbreviation for BST
- A - short form of 'Alpha'
- Europe/Belfast
- Europe/Guernsey
- Europe/Isle_of_Man
- Europe/Jersey
- Europe/London
- GB
- GB-Eire
- British Summer Time - UTC +1
- Bangladesh Standard Time - UTC +6
- Bougainville Standard Time - UTC +11
- BST - British Summer Time
- CET - Central European Time
- IST - Irish Standard Time
- WEST - Western European Summer Time
- A - Alpha Time Zone
- CET - Central European Time
- MEZ - Mitteleuropäische Zeit
- WAT - West Africa Time
- WST - Western Sahara Summer Time
- BMT - Biel Mean Time
Colombia Time
Offset: COT is 5 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Colombia
Principal Cities: The largest city in the COT time zone is Bogotá in Colombia, with about 7.674 million people. Other major cities in this time zone include Cali, Medellín, Barranquilla, Cartagena.
Daylight Saving: Clocks in Colombia Time (COT) do not change for daylight saving time, so COT stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
COT representations, usage and related time zones
- -05 - basic short
- -0500 - basic
- -05:00 - extended
- -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates an offset of five hours to the west of the zero meridian.
- Romeo - Military abbreviation for COT
- R - short form of 'Romeo'
- CDT - Central Daylight Time
- EST - Eastern Standard Time
- ET - Eastern Time
- COT - Colombia Time
- CST - Cuba Standard Time
- EASST - Easter Island Summer Time
- ECT - Ecuador Time
- PET - Peru Time
- R - Romeo Time Zone