America/Argentina/La_Rioja is an IANA time zone used in Argentina. It stays on UTC−3 all year.
America/Argentina/La_Rioja at a glance
| UTC offset now | UTC−3 |
|---|---|
| Standard time | UTC−3 |
| Used in | Argentina |
How America/Argentina/La_Rioja keeps time
America/Argentina/La_Rioja has stayed on UTC−3 since its last daylight saving period in 2008. Software that still applies an old rule will show the wrong time, so keep tz data up to date.
Recent and upcoming changes in America/Argentina/La_Rioja
| Date | Change | New offset |
|---|---|---|
| Monday, May 31, 2004 | Clocks go back 1 hour: 12:00 AM becomes 11:00 PM | UTC−4 |
| Sunday, June 20, 2004 | Standard offset changes from UTC−4 to UTC−3 | UTC−3 |
| Sunday, December 30, 2007 | Clocks go forward 1 hour: 12:00 AM becomes 1:00 AM | UTC−2 |
| Saturday, March 15, 2008 | Clocks go back 1 hour for good: 12:00 AM becomes 11:00 PM | UTC−3 |
The base offset of this zone changed in 2004, from UTC−4 to UTC−3. Old timestamps should be converted with the rule that applied at the time.
Countries and cities on America/Argentina/La_Rioja
America/Argentina/La_Rioja is used in Argentina. These are the largest cities in our list that follow it.
America/Argentina/La_Rioja 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/La_Rioja today. Their clock-change rules may differ.
- America/Araguaina
- America/Argentina/Buenos_Aires
- America/Argentina/Catamarca
- America/Argentina/Cordoba
- America/Argentina/Jujuy
- America/Argentina/Mendoza
- America/Argentina/Salta
- America/Argentina/San_Juan
- America/Argentina/San_Luis
- America/Argentina/Tucuman
- America/Asuncion
- America/Bahia
Using America/Argentina/La_Rioja in software
Use the zone name America/Argentina/La_Rioja 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/La_Rioja:
// JavaScript
new Intl.DateTimeFormat('en-GB', { timeZone: 'America/Argentina/La_Rioja', timeStyle: 'long' }).format(new Date());
# Python
from datetime import datetime
from zoneinfo import ZoneInfo
datetime.now(ZoneInfo('America/Argentina/La_Rioja'))
// PHP
(new DateTime('now', new DateTimeZone('America/Argentina/La_Rioja')))->format('c');
# Shell
TZ=America/Argentina/La_Rioja datePlan around the time in America/Argentina/La_Rioja
- Convert a time to or from America/Argentina/La_Rioja: pick a date and time and see it in every city on your list.
- Add La Rioja to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in America/Argentina/La_Rioja 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/La_Rioja?
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.