UTC−4 time now

About UTC−4

UTC−4 is 4 hours behind Coordinated Universal Time: when it is noon UTC, it is 8:00 AM at UTC−4.

12 zones keep UTC−4 all year, covering 27 countries or territories.

7 zones use it only in winter and move to UTC−3 in summer, for example Santiago, Halifax and Sydney.

15 zones reach it only in summer, from standard time UTC−5, for example New York City, Toronto and Havana. So the set of places on UTC−4 changes twice a year.

For a fixed offset in software, tzdata provides Etc/GMT+4; note the inverted sign of these POSIX-style names.

Abbreviations for UTC−4: EDT (Eastern Daylight Time), AST (Atlantic Standard Time).

UTC−4 and the sun

Across the large cities that keep UTC−4 all year, the clock runs 21 minutes behind mean solar time in Campo Grande (-54.6°) and 49 minutes ahead of it in San Cristóbal (-72.2°). The offset’s own meridian is 60° west: the further a city lies from it, the further its clocks drift from the sun.

Neighbouring offsets: UTC−5 (Lima and Bogotá) and UTC−3:30.

Zones that moved to or from UTC−4 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
• Sunday, November 4, 2018: Providenciales (America/Grand_Turk) moved from UTC−4 to UTC−5
• Sunday, May 1, 2016: Caracas (America/Caracas) moved from UTC−4:30 to UTC−4
• Sunday, March 8, 2015: Providenciales (America/Grand_Turk) moved from UTC−5 to UTC−4
• Sunday, November 10, 2013: Benjamin Constant (America/Eirunepe) moved from UTC−4 to UTC−5
• Sunday, November 10, 2013: Rio Branco (America/Rio_Branco) moved from UTC−4 to UTC−5
• 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: Benjamin Constant (America/Eirunepe) moved from UTC−5 to UTC−4
• Tuesday, June 24, 2008: Rio Branco (America/Rio_Branco) moved from UTC−5 to UTC−4
• 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
• Sunday, December 9, 2007: Caracas (America/Caracas) moved from UTC−4 to UTC−4:30

Since when UTC−4 has been used

The tzdata record of each zone that keeps UTC−4 as its standard time, with the date it moved to UTC−4 and the time it kept before. The earliest is San Juan, on UTC−4 since Tuesday, March 28, 1899; the most recent is Caracas, since Sunday, May 1, 2016.

And 3 more zones.

UTC−4 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−4 all year

On UTC−4 in winter only

On UTC−4 in summer only

Neighbouring offsets and related pages

• UTC−5 time
• UTC−3:30 time
• UTC time
• EDT time
• AST time
• Time zones of the world
• Daylight saving time