What UTC−3 means
A clock set to UTC−3 shows UTC minus 3 hours. When it is 12:00 noon UTC, it is 9:00 am here. Compared with India (UTC+5:30) it is 8 hours 30 minutes behind.
Converting to and from UTC−3
To turn UTC into this time, subtract 3 hours. To go back to UTC, add the same amount. Three examples: 6:00 am UTC is 3:00 am here; 3:00 pm UTC is 12:00 pm here; 9:00 am here is 12:00 pm UTC. The calendar date changes whenever the sum passes midnight.
Where UTC−3 sits on the map
The Earth turns 15 degrees of longitude every hour. The line where the sun-time matches UTC−3 exactly is 45° west. The places that use it are spread much wider than that one line. Of the main cities listed below, Coyhaique (72.1° west) is the farthest west and Recife (34.9° west) the farthest east. By the sun they are about 2 hours 29 minutes apart, yet their clocks agree.
Who is on UTC−3, and when
27 zone areas in 8 countries and territories keep UTC−3 through the whole year. The towns of 15,000 or more there hold about 209 million people (GeoNames figures). 6 more zone areas are on it for only part of the year: for 1 of them it is the standard (winter) time and for 5 it is the moved (summer) time. That is why the number of people on UTC−3 rises and falls with the seasons.
Noon at UTC−3 elsewhere
When a clock on UTC−3 shows 12:00 noon, it is 8:30 pm in India; 3:00 pm in London in January and 4:00 pm in July; 10:00 am in New York in January and 11:00 am in July; 12:00 am the next day in Tokyo. For any other place or date, use the converter.
Largest cities on this time
São Paulo, Rio de Janeiro, Santiago, Buenos Aires, Belo Horizonte, Salvador, Fortaleza, Córdoba.
All year
These places keep UTC−3 through the whole year.
- Buenos Aires, Argentina
- Catamarca, Argentina
- Cordoba, Argentina
- Jujuy, Argentina
- La Rioja, Argentina
- Mendoza, Argentina
- Rio Gallegos, Argentina
- Salta, Argentina
- San Juan, Argentina
- San Luis, Argentina
- Tucuman, Argentina
- Ushuaia, Argentina
- Araguaina, Brazil
- Bahia, Brazil
- Belem, Brazil
- Fortaleza, Brazil
- Maceio, Brazil
- Recife, Brazil
- Santarem, Brazil
- Sao Paulo, Brazil
- Coyhaique, Chile
- Punta Arenas, Chile
- Falkland Islands
- French Guiana
- Paraguay
- Suriname
- Uruguay
Part of the year
These places are on UTC−3 for part of the year and move their clocks for the rest. Open one for its dates.
Neighbouring offsets: UTC−4, UTC−3:30, UTC−2:30, UTC−2. All UTC offsets.