America/Argentina/San_Luis is an IANA time zone used in Argentina. It stays on UTC−3 all year.
America/Argentina/San_Luis at a glance
| UTC offset now | UTC−3 |
|---|---|
| Standard time | UTC−3 |
| Used in | Argentina |
Rules of the America/Argentina/San_Luis time zone
No clock changes are scheduled in America/Argentina/San_Luis. The last one for daylight saving time was in 2009; since then the offset has been UTC−3 all year.
Recent and upcoming changes in America/Argentina/San_Luis
| Date | Change | New offset |
|---|---|---|
| Saturday, March 8, 2008 | Clocks go back 1 hour: 12:00 AM becomes 11:00 PM | UTC−4 |
| Sunday, October 12, 2008 | Clocks go forward 1 hour: 12:00 AM becomes 1:00 AM | UTC−3 |
| Saturday, March 7, 2009 | Clocks go back 1 hour: 12:00 AM becomes 11:00 PM | UTC−4 |
| Sunday, October 11, 2009 | Clocks go forward 1 hour and stay there: 12:00 AM becomes 1:00 AM | UTC−3 |
The base offset of this zone changed in 2009, from UTC−4 to UTC−3. Old timestamps should be converted with the rule that applied at the time.
Where America/Argentina/San_Luis is used
America/Argentina/San_Luis is used in Argentina. These are the largest cities in our list that follow it.
America/Argentina/San_Luis compared with other time zones
Differences change during the year when one side moves to or from daylight saving time, so the table shows January and July separately.
| City | Time now | Difference now | In January | In July |
|---|---|---|---|---|
| New York (United States) | --:-- | 2 h behind | 2 h behind | 1 h behind |
| Los Angeles (United States) | --:-- | 5 h behind | 5 h behind | 4 h behind |
| London (United Kingdom) | --:-- | 3 h ahead | 3 h ahead | 4 h ahead |
| Paris (France) | --:-- | 4 h ahead | 4 h ahead | 5 h ahead |
| Dubai (United Arab Emirates) | --:-- | 7 h ahead | 7 h ahead | 7 h ahead |
| Mumbai (India) | --:-- | 8 h 30 min ahead | 8 h 30 min ahead | 8 h 30 min ahead |
| Singapore | --:-- | 11 h ahead | 11 h ahead | 11 h ahead |
| Tokyo (Japan) | --:-- | 12 h ahead | 12 h ahead | 12 h ahead |
| Sydney (Australia) | --:-- | 14 h ahead | 14 h ahead | 13 h ahead |
| UTC | --:-- | 3 h ahead | 3 h ahead | 3 h ahead |
Other zones on UTC−3 right now
These IANA zones show the same time as America/Argentina/San_Luis today. Their clock-change rules may differ.
- America/Araguaina
- America/Argentina/Buenos_Aires
- America/Argentina/Catamarca
- America/Argentina/Cordoba
- America/Argentina/Jujuy
- America/Argentina/La_Rioja
- America/Argentina/Mendoza
- America/Argentina/Salta
- America/Argentina/San_Juan
- America/Argentina/Tucuman
- America/Asuncion
- America/Bahia
Using America/Argentina/San_Luis in software
Use the zone name America/Argentina/San_Luis rather than an abbreviation or a fixed offset. Abbreviations can mean several zones, and offsets ignore future clock changes.
Show the current time in America/Argentina/San_Luis:
// JavaScript
new Intl.DateTimeFormat('en-GB', { timeZone: 'America/Argentina/San_Luis', timeStyle: 'long' }).format(new Date());
# Python
from datetime import datetime
from zoneinfo import ZoneInfo
datetime.now(ZoneInfo('America/Argentina/San_Luis'))
// PHP
(new DateTime('now', new DateTimeZone('America/Argentina/San_Luis')))->format('c');
# Shell
TZ=America/Argentina/San_Luis datePlan around the time in America/Argentina/San_Luis
- Convert a time to or from America/Argentina/San_Luis: pick a date and time and see it in every city on your list.
- Add San Luis to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in America/Argentina/San_Luis and the other cities you work with.
- Open a full-screen clock for your own time zone.
Frequently asked questions
What is the UTC offset of America/Argentina/San_Luis?
UTC−3, all year.
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.