St. Louis, MO to Buenos Aires: time difference
Buenos Aires is 2 h ahead of St. Louis, MO. Live clocks for both, the working hours they share, and how each one sits against your own time.
+2 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
St. Louis, MO 18:28 6:28 PM Buenos Aires 20:28 8:28 PM You –:–
18:28 6:28 PM
Central Daylight Time · UTC-5
☀️ 07:17 · 🌙 18:16
20:28 8:28 PM
Argentina Standard Time · UTC-3
☀️ 06:05 · 🌙 19:13
·
+2 h
Buenos Aires is 2 h ahead of St. Louis, MO.
When you, St. Louis, MO 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
🇺🇸 St. Louis, MO
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
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 0 12 AM 1 1 AM
📍 Your time
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Time zones side by side
| Detail | 🇺🇸 St. Louis, MO | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 18:28 | 20:28 |
| Local date | Wednesday, October 21, 2026 | Wednesday, October 21, 2026 |
| Time zone | Central Daylight Time | Argentina Standard Time |
| UTC offset | UTC-5 | UTC-3 |
| Offset from St. Louis, MO | — | +2 h |
| IANA zone | America/Chicago | America/Argentina/Buenos Aires |
| Daylight saving | On summer time → UTC-6, Nov 1, 01:00 | Not observed |
| Sunrise | 07:17 | 06:05 |
| Sunset | 18:16 | 19:13 |
| Daylight | 10 h 59 min | 13 h 8 min |
| People on this clock | 301,578 | 2,891,082 |
Compare St. Louis, MO with another city
More comparisons with St. Louis, MO: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
St. Louis, MO and Buenos Aires: common questions
How many hours ahead of St. Louis, MO, is Buenos Aires?
The clocks in Buenos Aires are 2 hours ahead of those in St. Louis (UTC−3 and UTC−5).
What time is it in Buenos Aires at the start of the working day in St. Louis, MO?
The working day in St. Louis starts at 9:00 AM; in Buenos Aires it is 11:00 AM at that moment.
What time is it in Buenos Aires at the end of the working day in St. Louis, MO?
The working day in St. Louis ends at 6:00 PM; in Buenos Aires it is 8:00 PM at that moment.
When do working hours in St. Louis, MO, and in Buenos Aires overlap?
Working hours (9:00 AM–6:00 PM) overlap from 9:00 AM to 4:00 PM in St. Louis, which is 11:00 AM to 6:00 PM in Buenos Aires.
When does the date change in Buenos Aires compared with St. Louis, MO?
The new day starts in Buenos Aires earlier: at 10:00 PM in St. Louis it is already midnight there. Until 2:00 AM in Buenos Aires, St. Louis is still on the previous day.
Is the time difference between St. Louis, MO, and Buenos Aires the same all year?
No. Only St. Louis switches to summer time, so the gap changes twice a year. From November 1, 2026, Buenos Aires will be 3 hours ahead of St. Louis.
