Chelmsford to Buenos Aires: time difference
Buenos Aires is 4 h behind Chelmsford. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Chelmsford 02:40 2:40 AM Buenos Aires 22:40 10:40 PM You –:–
02:40 2:40 AM
British Summer Time · UTC+1
☀️ 07:28 · 🌙 18:00
22:40 10:40 PM
Argentina Standard Time · UTC-3
☀️ 06:10 · 🌙 19:10
·
−4 h
Buenos Aires is 4 h behind Chelmsford.
When you, Chelmsford and Buenos Aires are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇬🇧 Chelmsford
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇦🇷 Buenos Aires
20 8 PM 21 9 PM 22 10 PM 23 11 PM 0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇬🇧 Chelmsford | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 02:40 | 22:40 |
| Local date | Sunday, October 18, 2026 | Saturday, October 17, 2026 |
| Time zone | British Summer Time | Argentina Standard Time |
| UTC offset | UTC+1 | UTC-3 |
| Offset from Chelmsford | — | −4 h |
| IANA zone | Europe/London | America/Argentina/Buenos Aires |
| Daylight saving | On summer time → UTC+0, Oct 25, 01:00 | Not observed |
| Sunrise | 07:28 | 06:10 |
| Sunset | 18:00 | 19:10 |
| Daylight | 10 h 33 min | 13 h |
| People on this clock | 176,194 | 2,891,082 |
Compare Chelmsford with another city
More comparisons with Chelmsford: the time zones next to it and the far side of the clock.
Big time differences
Chelmsford and Buenos Aires: common questions
What is the time difference between Chelmsford and Buenos Aires?
Buenos Aires is 4 hours behind: it uses UTC−3, while Chelmsford is on UTC+1.
If it is 9:00 AM in Chelmsford, what time is it in Buenos Aires?
At 9:00 AM in Chelmsford, clocks in Buenos Aires show 5:00 AM.
If it is 6:00 PM in Chelmsford, what time is it in Buenos Aires?
At 6:00 PM in Chelmsford, clocks in Buenos Aires show 2:00 PM.
Is there a time when both Chelmsford and Buenos Aires are at work?
Yes: from 1:00 PM to 6:00 PM in Chelmsford (9:00 AM to 2:00 PM in Buenos Aires), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Buenos Aires compared with Chelmsford?
The new day starts in Buenos Aires later: until 4:00 AM in Chelmsford, it is still the previous day there. From 8:00 PM in Buenos Aires, Chelmsford is already on the next day.
Does the time difference between Chelmsford and Buenos Aires change?
Yes. The clocks change only in Chelmsford. From October 25, 2026, Buenos Aires will be 3 hours behind Chelmsford.
