London to San Juan: time difference
San Juan is 3 h behind London. Live clocks for both, the working hours they share, and how each one sits against your own time.
−3 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
London 15:35 3:35 PM San Juan 12:35 12:35 PM You –:–
15:35 3:35 PM
Greenwich Mean Time · UTC+0
☀️ 07:03 · 🌙 16:27
12:35 12:35 PM
Argentina Standard Time · UTC-3
☀️ 06:34 · 🌙 20:03
·
−3 h
San Juan is 3 h behind London.
When you, London and San Juan are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇬🇧 London
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
🇦🇷 San Juan
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 20 8 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇬🇧 London | 🇦🇷 San Juan |
|---|---|---|
| Local time | 15:35 | 12:35 |
| Local date | Friday, November 6, 2026 | Friday, November 6, 2026 |
| Time zone | Greenwich Mean Time | Argentina Standard Time |
| UTC offset | UTC+0 | UTC-3 |
| Offset from London | — | −3 h |
| IANA zone | Europe/London | America/Argentina/San Juan |
| Daylight saving | On standard time → UTC+1, Mar 28, 02:00 | Not observed |
| Sunrise | 07:03 | 06:34 |
| Sunset | 16:27 | 20:03 |
| Daylight | 9 h 24 min | 13 h 29 min |
| People on this clock | 8,908,083 | 522,029 |
Compare London with another city
More comparisons with London: the time zones next to it and the far side of the clock.
Big time differences
London and San Juan: common questions
How many hours behind London is San Juan?
The clocks in San Juan are 3 hours behind those in London (UTC−3 and UTC+0).
What time is it in San Juan at the start of the working day in London?
The working day in London starts at 9:00 AM; in San Juan it is 6:00 AM at that moment.
What time is it in San Juan at the end of the working day in London?
The working day in London ends at 6:00 PM; in San Juan it is 3:00 PM at that moment.
When is a good time to call San Juan from London?
Between 12:00 PM and 6:00 PM in London – that is 9:00 AM to 3:00 PM in San Juan – both places are within working hours (9:00 AM–6:00 PM).
Until what time in London is it still yesterday in San Juan?
Before 3:00 AM in London, the date in San Juan has not changed yet. From 9:00 PM in San Juan, it is already the next day in London.
Does the time difference between London and San Juan change?
Yes. The clocks change only in London. From March 28, 2027, San Juan will be 4 hours behind London.
