Buenos Aires to Guaynabo: time difference
Guaynabo is 1 h behind Buenos Aires. 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.
Buenos Aires 14:56 2:56 PM Guaynabo 13:56 1:56 PM You –:–
14:56 2:56 PM
Argentina Standard Time · UTC-3
☀️ 06:10 · 🌙 19:10
13:56 1:56 PM
Atlantic Standard Time · UTC-4
☀️ 06:19 · 🌙 18:02
·
−1 h
Guaynabo is 1 h behind Buenos Aires.
When you, Buenos Aires and Guaynabo are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇦🇷 Buenos Aires
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
🇵🇷 Guaynabo
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 21 9 PM 22 10 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇦🇷 Buenos Aires | 🇵🇷 Guaynabo |
|---|---|---|
| Local time | 14:56 | 13:56 |
| Local date | Saturday, October 17, 2026 | Saturday, October 17, 2026 |
| Time zone | Argentina Standard Time | Atlantic Standard Time |
| UTC offset | UTC-3 | UTC-4 |
| Offset from Buenos Aires | — | −1 h |
| IANA zone | America/Argentina/Buenos Aires | America/Puerto Rico |
| Daylight saving | Not observed | Not observed |
| Sunrise | 06:10 | 06:19 |
| Sunset | 19:10 | 18:02 |
| Daylight | 13 h | 11 h 42 min |
| People on this clock | 2,891,082 | 68,491 |
Compare Buenos Aires with another city
More comparisons with Buenos Aires: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Buenos Aires and Guaynabo: common questions
What is the time difference between Buenos Aires and Guaynabo?
Guaynabo is 1 hour behind: it uses UTC−4, while Buenos Aires is on UTC−3.
What time is it in Guaynabo when it is 9:00 AM in Buenos Aires?
When it is 9:00 AM in Buenos Aires, it is 8:00 AM in Guaynabo.
What time is it in Guaynabo when it is 6:00 PM in Buenos Aires?
When it is 6:00 PM in Buenos Aires, it is 5:00 PM in Guaynabo.
Is there a time when both Buenos Aires and Guaynabo are at work?
Yes: from 10:00 AM to 6:00 PM in Buenos Aires (9:00 AM to 5:00 PM in Guaynabo), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Guaynabo compared with Buenos Aires?
The new day starts in Guaynabo later: until 1:00 AM in Buenos Aires, it is still the previous day there. From 11:00 PM in Guaynabo, Buenos Aires is already on the next day.
Is the time difference between Buenos Aires and Guaynabo the same all year?
Yes. Neither Buenos Aires nor Guaynabo switches to summer time, so the gap is always 1 hour.
