BST to CLST Converter
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Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
1:00 pm13:00 BST (UTC+1), Oct 18, 2026 = 9:00 am09:00 CLST (UTC-3), Oct 18, 2026
BST is 4 hours ahead of CLST.
BST and CLST examples
These examples always use BST (UTC+1) and CLST (UTC-3). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
BST is 4 hours ahead of CLST.
How the time difference changes
Depending on seasonal clock changes, GMT is 3 hours ahead of CLST, BST is 4 hours ahead of CLST, or BST is 5 hours ahead of CLT.
Depending on seasonal clock changes, working hours of 9:00 am to 6:00 pm in GMT correspond to 6:00 am to 3:00 pm in CLST, working hours of 9:00 am to 6:00 pm in BST correspond to 5:00 am to 2:00 pm in CLST, or working hours of 9:00 am to 6:00 pm in BST correspond to 4:00 am to 1:00 pm in CLT.Depending on seasonal clock changes, working hours of 09:00 to 18:00 in GMT correspond to 06:00 to 15:00 in CLST, working hours of 09:00 to 18:00 in BST correspond to 05:00 to 14:00 in CLST, or working hours of 09:00 to 18:00 in BST correspond to 04:00 to 13:00 in CLT.
Compare BST time with CLST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
British Summer Time is 4 hours ahead of Chile Summer Time.
1:00 pm13:00 in BST is 9:00 am09:00 in CLST
BST to CLST call time
Best time for a conference call or a meeting is between 1pm-6pm13:00-18:00 in BST which corresponds to 9am-2pm09:00-14:00 in CLST
1:00 pm13:00 British Summer Time (BST). Offset UTC +1:00 hour
9:00 am09:00 Chile Summer Time (CLST). Offset UTC -3:00 hours
1:00 pm13:00 BST / 9:00 am09:00 CLST
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.
Current time in the United Kingdom: UK time now
Today all shaded areas are on BST.
Daylight Saving: British Summer Time (BST) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Greenwich Mean Time (GMT).
Start: British Summer Time (BST) started on Sunday, March 29, 2026 at 1:00 am01:00 local time and clocks were set one hour forward to Sunday, March 29, 2026, 2:00 am02:00. Daylight saving starts annually on the last Sunday of March.
End: British Summer Time (BST) ends on Sunday, October 25, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, October 25, 2026, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the last Sunday of October.
See United Kingdom daylight saving time and upcoming clock changes worldwide.
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
Chile Summer Time
Offset: CLST is 3 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Chile
Principal Cities: The largest city in the CLST time zone is Santiago in Chile, with about 4.837 million people. Other major cities in this time zone include Antofagasta, Viña del Mar, Valparaíso, Puerto Montt.
Today all shaded areas are on CLST.
Daylight Saving: Chile Summer Time (CLST) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Chile Standard Time (CLT).
Start: Chile Summer Time (CLST) started on Sunday, September 6, 2026 at 12:00 am00:00 local time and clocks were set one hour forward to Sunday, September 6, 2026, 1:00 am01:00.
End: Chile Summer Time (CLST) ends on Sunday, April 4, 2027 at 12:00 am00:00 local time and clocks are set one hour back to Saturday, April 3, 2027, 11:00 pm23:00 local standard time instead.
See Chile daylight saving time and upcoming clock changes worldwide.
CLST representations, usage and related time zones
- -03 - basic short
- -0300 - basic
- -03:00 - extended
- -0300 - sign character (-) followed by a four digit time providing hours (03) and minutes (00) of the offset. Indicates an offset of three hours to the west of the zero meridian.
- Papa - Military abbreviation for CLST
- P - short form of 'Papa'
- ADT - Atlantic Daylight Time
- PMT - Pierre & Miquelon Standard Time
- PMST - Pierre & Miquelon Standard Time
- AMST - Amazon Summer Time
- ART - Argentina Time
- BRT - Brasilia Time
- CLST - Chile Summer Time
- FKST - Falkland Islands Summer Time
- FKT - Falkland Islands Time
- GFT - French Guiana Time
- P - Papa Time Zone
- PYST - Paraguay Summer Time
- PYT - Paraguay Time
- SRT - Suriname Time
- UYT - Uruguay Time