Buenos Aires keeps UTC−3 all year. There is no daylight saving time, so the clock never changes.
Buenos Aires and your time
Buenos Aires at a glance
| Country | Argentina |
|---|---|
| Region | Buenos Aires F.D. |
| Capital of | Argentina |
| Time zone | America/Argentina/Buenos_Aires |
| UTC offset now | UTC−3 |
| Daylight saving time | Not observed since 2009 |
| Coordinates | 34.61° S, 58.38° W |
Buenos Aires time zone and clock changes
Buenos Aires follows the America/Argentina/Buenos_Aires time zone and stays on UTC−3 all year. Clocks here last changed for daylight saving time in 2009; the tz database lists no change after that.
Buenos Aires is the capital, and all of Argentina keeps this time.
Clock changes in Buenos Aires, 2026 and 2027
No clock changes are scheduled in Buenos Aires for 2026 or 2027.
Time difference between Buenos Aires and other cities
When it is 9:00 AM in Buenos Aires, it is 12:00 PM in London, 11:00 PM in Sydney and 4:00 AM in Los Angeles.
| City | Time now | Difference now | In January | In July | Shared office hours |
|---|---|---|---|---|---|
| New York (United States) | --:-- | 2 h behind | 2 h behind | 1 h behind | 6 h |
| Los Angeles (United States) | --:-- | 5 h behind | 5 h behind | 4 h behind | 3 h |
| London (United Kingdom) | --:-- | 3 h ahead | 3 h ahead | 4 h ahead | 5 h |
| Paris (France) | --:-- | 4 h ahead | 4 h ahead | 5 h ahead | 4 h |
| Dubai (United Arab Emirates) | --:-- | 7 h ahead | 7 h ahead | 7 h ahead | 1 h |
| Mumbai (India) | --:-- | 8 h 30 min ahead | 8 h 30 min ahead | 8 h 30 min ahead | None |
| Singapore | --:-- | 11 h ahead | 11 h ahead | 11 h ahead | None |
| Tokyo (Japan) | --:-- | 12 h ahead | 12 h ahead | 12 h ahead | None |
| Sydney (Australia) | --:-- | 14 h ahead | 14 h ahead | 13 h ahead | None |
| UTC | --:-- | 3 h ahead | 3 h ahead | 3 h ahead | 5 h |
Buenos Aires never changes its clocks, but many of these cities do. Where the January and July columns disagree, the gap shifts when the other city moves to or from daylight saving time.
Shared office hours counts the time when the clock reads between 9 AM and 5 PM in both cities on the same day.
Daylight in Buenos Aires
Today
| Sunrise | --:-- |
|---|---|
| Sunset | --:-- |
| Day length | -- |
| Solar noon | --:-- |
Buenos Aires is in the southern hemisphere, so the longest day comes in December (14 hours 29 minutes) and the shortest in June (9 hours 50 minutes). The latest sunset, at 8:10 PM, falls on January 6.
Daylight through the year in Buenos Aires
| Date | Sunrise | Sunset | Day length | |
|---|---|---|---|---|
| March equinox | March 20 | 6:57 AM | 7:05 PM | 12 h 8 min |
| June solstice | June 21 | 8:00 AM | 5:50 PM | 9 h 50 min |
| September equinox | September 22 | 6:43 AM | 6:50 PM | 12 h 7 min |
| December solstice | December 21 | 5:37 AM | 8:06 PM | 14 h 29 min |
When the sun is highest in Buenos Aires
The clock in Buenos Aires runs ahead of the sun. Solar noon, the moment the sun is highest, comes at about 12:55 PM on standard time. That is why sunrise and sunset both come late here.
Cities near Buenos Aires
Every city below shares Buenos Aires’s clock.
| City | Distance | Time now | Difference |
|---|---|---|---|
| Quilmes | 16 km (10 mi) | --:-- | Same time |
| Gregorio de Laferrere | 24 km (15 mi) | --:-- | Same time |
| Ezeiza | 30 km (19 mi) | --:-- | Same time |
| Merlo | 33 km (20 mi) | --:-- | Same time |
| Jose C. Paz | 37 km (23 mi) | --:-- | Same time |
| La Plata | 52 km (32 mi) | --:-- | Same time |
| Montevideo (Uruguay) | 203 km (126 mi) | --:-- | Same time |
| San Nicolás de los Arroyos | 221 km (137 mi) | --:-- | Same time |
Same time now, different rules
These places read the same time as Buenos Aires today but follow different rules, so they can drift apart when clocks change.
More cities in Argentina
All time zones and cities in Argentina
Tools for time in Buenos Aires
- Convert a time to or from Buenos Aires: pick a date and time and see it in every city on your list.
- Add Buenos Aires to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in Buenos Aires and the other cities you work with.
- Open a full-screen clock for your own time zone.
Frequently asked questions
What time zone is Buenos Aires in?
Buenos Aires uses the America/Argentina/Buenos_Aires time zone, which is UTC−3 all year.
Does Buenos Aires use daylight saving time?
Not any more. Buenos Aires last changed its clocks for daylight saving time in 2009 and now stays on UTC−3 all year.
What is the time difference between Buenos Aires and London?
Buenos Aires is 3 hours behind London in January and 4 hours behind London in July, because London moves its clocks for daylight saving time and Buenos Aires does not.
How long is the longest day in Buenos Aires?
About 14 hours 29 minutes, around the December solstice. The shortest day, around the June solstice, has about 9 hours 50 minutes of daylight.
Why is the sun not highest at noon in Buenos Aires?
Clock time follows the time zone, not the sun. Buenos Aires lies west of the line its offset is based on, so solar noon comes at about 12:55 PM on standard time.
Time zone rules: IANA tz database, version 2026e. Place names and coordinates: GeoNames. Sunrise and sunset are calculated from the coordinates and can differ by a minute or two from local almanacs.