UTC−3 time now

About UTC−3

UTC−3 is 3 hours behind Coordinated Universal Time: when it is noon UTC, it is 9:00 AM at UTC−3.

29 zones keep UTC−3 all year, covering 9 countries or territories: Brazil, Argentina, Paraguay, Uruguay, Suriname, Chile, French Guiana, Falkland Islands and Antarctica.

1 zone uses it only in winter and moves to UTC−2 in summer, for example Saint-Pierre.

7 zones reach it only in summer, from standard time UTC−4, for example Santiago, Halifax and Sydney. So the set of places on UTC−3 changes twice a year.

For a fixed offset in software, tzdata provides Etc/GMT+3; note the inverted sign of these POSIX-style names.

Abbreviations for UTC−3: ADT (Atlantic Daylight Time), PMST (St. Pierre & Miquelon Standard Time), BRT (Brasília Time).

UTC−3 and the sun

Across the large cities that keep UTC−3 all year, the clock runs 41 minutes behind mean solar time in João Pessoa (-34.9°) and 95 minutes ahead of it in Ciudad de Las Heras (-68.8°). The offset’s own meridian is 45° west: the further a city lies from it, the further its clocks drift from the sun.

Neighbouring offsets: UTC−3:30 and UTC−2:30.

Zones that moved to or from UTC−3 since 1970

Changes of the winter (standard) offset recorded in tzdata; ordinary seasonal daylight saving changes are not counted:

• Sunday, October 6, 2024: Asunción (America/Asuncion) moved from UTC−4 to UTC−3
• Sunday, September 8, 2024: Coyhaique (America/Coyhaique) moved from UTC−4 to UTC−3
• Saturday, March 25, 2023: Nuuk (America/Nuuk) moved from UTC−3 to UTC−2
• Sunday, September 5, 2010: Stanley (Atlantic/Stanley) moved from UTC−4 to UTC−3
• Sunday, October 11, 2009: San Luis (America/Argentina/San_Luis) moved from UTC−4 to UTC−3
• Tuesday, June 24, 2008: Santarém (America/Santarem) moved from UTC−4 to UTC−3
• Sunday, March 9, 2008: San Luis (America/Argentina/San_Luis) moved from UTC−3 to UTC−4
• Monday, January 1, 1996: Danmarkshavn (America/Danmarkshavn) moved from UTC−3 to UTC+0
• Sunday, October 18, 1992: Ciudad de Las Heras (America/Argentina/Mendoza) moved from UTC−4 to UTC−3
• Sunday, March 29, 1992: Georgetown (America/Guyana) moved from UTC−3 to UTC−4
• Sunday, October 6, 1991: San Salvador de Jujuy (America/Argentina/Jujuy) moved from UTC−4 to UTC−3
• Sunday, October 15, 1989: San Salvador de Jujuy (America/Argentina/Jujuy) moved from UTC−3 to UTC−4
• Sunday, October 15, 1989: Ciudad de Las Heras (America/Argentina/Mendoza) moved from UTC−3 to UTC−4
• Sunday, February 7, 1988: Boa Vista (America/Boa_Vista) moved from UTC−3 to UTC−4

Since when UTC−3 has been used

The tzdata record of each zone that keeps UTC−3 as its standard time, with the date it moved to UTC−3 and the time it kept before. The earliest is Recife, on UTC−3 since Wednesday, December 31, 1913; the most recent is Asunción, since Monday, October 14, 2024.

And 15 more zones.

UTC−3 converted to other offsets

Fixed offsets only, so the table holds on any date; a city that observes daylight saving time is an hour later than its standard column in summer.

On UTC−3 all year

On UTC−3 in winter only

On UTC−3 in summer only

Neighbouring offsets and related pages

• UTC−3:30 time
• UTC−2:30 time
• UTC time
• ADT time
• PMST time
• BRT time
• Time zones of the world
• Daylight saving time