What is BST in ART?
Argentina Time is 4 hours behind
British Time is on UTC+1:00 and Argentina Time is on UTC−3:00 right now. British Time is on daylight saving, so its clocks read BST. The gap changes during the year — see below.
- Time in London
- 3:56 am
- Time in Buenos Aires
- 11:56 pm
- Difference
- −4 h
- Next clock change
- October 25, 2026
Convert a time
ART — Argentina Time
11:00 pm
Tue, the previous day
When the difference changes
British Time and Argentina Time do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:
- Now – October 25, 2026Argentina Time is 4 hours behind
- October 25, 2026 – March 28, 2027Argentina Time is 3 hours behind
- March 28, 2027 – onwardsArgentina Time is 4 hours behind
Periods shorter than a day are not listed: both zones change at 2am in their own local time, so there are a few hours on each transition date when the gap is briefly something else.
Daylight saving
British Time
Clocks go back one hour at 2am local time, becoming GMT.
Argentina Time
Argentina Time stays on ART all year, so its offset from UTC never moves.
BST to ART conversion table
Every hour of Wednesday, September 23, 2026, converted from British Time to Argentina Time. 4 of the 24 hours fall on a different calendar day in Buenos Aires, which is marked.
- 12:00 am BST
- 8:00 pm ART−1 day
- 1:00 am BST
- 9:00 pm ART−1 day
- 2:00 am BST
- 10:00 pm ART−1 day
- 3:00 am BST
- 11:00 pm ART−1 day
- 4:00 am BST
- 12:00 am ART
- 5:00 am BST
- 1:00 am ART
- 6:00 am BST
- 2:00 am ART
- 7:00 am BST
- 3:00 am ART
- 8:00 am BST
- 4:00 am ART
- 9:00 am BST
- 5:00 am ART
- 10:00 am BST
- 6:00 am ART
- 11:00 am BST
- 7:00 am ART
- 12:00 pm BST
- 8:00 am ART
- 1:00 pm BST
- 9:00 am ART
- 2:00 pm BST
- 10:00 am ART
- 3:00 pm BST
- 11:00 am ART
- 4:00 pm BST
- 12:00 pm ART
- 5:00 pm BST
- 1:00 pm ART
- 6:00 pm BST
- 2:00 pm ART
- 7:00 pm BST
- 3:00 pm ART
- 8:00 pm BST
- 4:00 pm ART
- 9:00 pm BST
- 5:00 pm ART
- 10:00 pm BST
- 6:00 pm ART
- 11:00 pm BST
- 7:00 pm ART
Scheduling between the two
Working hours overlap from 1:00 pm to 6:00 pm BST, which is 9:00 am to 2:00 pm ART. Anything inside that window falls in the normal working day at both ends.
A note on BST: it can also mean Bangladesh Standard Time (UTC+6). This page means British Summer Time.
British Time (BST) is used in the whole United Kingdom. In winter the UK is on GMT; from late March to late October it is on BST, an hour ahead.