The Info List - Atlantic Time Zone

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The Atlantic Time Zone
Atlantic Time Zone
is a geographical region that keeps standard time—called Atlantic Standard Time
Atlantic Standard Time
(AST)—by subtracting four hours from Coordinated Universal Time
Coordinated Universal Time
(UTC), resulting in UTC-4; during part of the year some parts of it observe daylight saving time by instead subtracting only three hours (UTC-3). The clock time in this zone is based on the mean solar time of the 60th meridian west
60th meridian west
of the Greenwich Observatory. In Canada, the provinces of New Brunswick,[1] Nova Scotia,[2] and Prince Edward Island
Prince Edward Island
reckon time specifically as an offset of 4 hours from Greenwich Mean time (GMT-4). Small portions of Quebec
(eastern Côte-Nord
and the Magdalen Islands) are also part of the Atlantic Standard Time Zone. Officially, the entirety of Newfoundland and Labrador
observes Newfoundland Standard Time,[3] but in practice most of Labrador
uses the Atlantic Standard Time
Atlantic Standard Time
Zone. No portion of the continental United States
United States
currently uses Atlantic Time; however the territories of Puerto Rico
Puerto Rico
and the U.S. Virgin Islands do use Atlantic Standard Time. A number of New England
New England
states are considering a regional year-round change to Atlantic Standard Time, even though only a small portion of Maine
lies to the east of the 67.5°W theoretical extent of this zone. Florida
is also considering a similar change; in both cases any changes would need to be approved by the United States
United States
Department of Transportation and the United States
United States
Congress. Those portions of the Atlantic Time Zone
Atlantic Time Zone
that participate in daylight saving time do so as Atlantic Daylight Time (ADT), which has one hour added to make it only three hours behind GMT (UTC-3).


1 Areas covered 2 U.S. states considering changing to Atlantic Time 3 See also 4 References 5 External links

Areas covered[edit]

Antigua and Barbuda
Antigua and Barbuda
(No DST) Barbados
(No DST) Brazil

Amazonas (except southwestern portion), Rondônia, Roraima
(No DST) Mato Grosso, Mato Grosso
Mato Grosso
do Sul

(No DST) Canada, in the following areas:

Nova Scotia New Brunswick Prince Edward Island Most of Labrador Magdalen Islands, Quebec Côte-Nord
(east of the 63rd meridian), Quebec

(except Magallanes region and Antarctic territory) Dominica
(No DST) Dominican Republic
Dominican Republic
(No DST) France
and French overseas collectivities, in the following areas:

(No DST) Martinique
(No DST) Saint-Barthélemy
(No DST) Saint-Martin (No DST)

Greenland, in the following area:

Thule Air Base

(No DST) Guyana
(No DST) Netherlands
and Dutch special municipalities, in the following areas:

(No DST) Bonaire
(No DST) Curaçao
(No DST) Saba
(No DST) Sint Eustatius
Sint Eustatius
(No DST) Sint Maarten
Sint Maarten
(No DST)

Paraguay Saint Kitts and Nevis
Saint Kitts and Nevis
(No DST) Saint Lucia
Saint Lucia
(No DST) Saint Vincent and the Grenadines
Saint Vincent and the Grenadines
(No DST) Trinidad and Tobago
Trinidad and Tobago
(No DST) United Kingdom
United Kingdom
(British Overseas Territories), in the following areas:

(No DST) Bermuda British Virgin Islands
British Virgin Islands
(No DST) Montserrat
(No DST) Turks and Caicos Islands
Turks and Caicos Islands
(No DST)[4]

United States, in the following areas:

Puerto Rico
Puerto Rico
(No DST) United States
United States
Virgin Islands (No DST)

(No DST)

U.S. states considering changing to Atlantic Time[edit] A Massachusetts
commission concluded in 2017 that the benefits of changing to Atlantic Standard Time
Atlantic Standard Time
would outweigh the disadvantages, provided that a majority of north-eastern states made the same change.[5] In May 2017, the Maine
Senate approved a change to Atlantic Time, on the condition there would be a referendum, and that Massachusetts
and New Hampshire
New Hampshire
decided to make the same switch.[6] Also in 2017, the New Hampshire
New Hampshire
House of Representatives approved a bill in favour of a regional change, but this was voted down by the state's Senate.[7]. Similar bills have been put forward in Connecticut and Rhode Island.[6] In Florida, two bills were approved in January 2018 by House and Senate committees, to move most of the state permanently to Atlantic Standard Time (with the panhandle moving to year-round Eastern Standard Time).[8] See also[edit]

Daylight saving time
Daylight saving time
in the Americas


^ "CHAPTER T-6 – Time Definition Act" (PDF). Archived from the original (PDF) on 2008-12-07. Retrieved 2012-09-11.  ^ "Time Definition Act". Archived from the original on 5 June 2008. Retrieved 2008-06-02.  ^ "RSNL1990 CHAPTER S-23 – STANDARD TIME ACT". Retrieved 2007-11-16.  ^ [1] ^ "Commission: Massachusetts
Should Change Time Zones, But Not On Its Own". November 1, 2017. Retrieved March 15, 2018.  ^ a b " Maine
Considers Atlantic Standard Time". www.timeanddate.com. Retrieved March 15, 2018.  ^ "Senate votes down push to switch N.H.'s time zone". May 11, 2017. Retrieved March 15, 2018.  ^ http://www.miamiherald.com/news/state/florida/article196453714.html

External links[edit]

World time zone map History of U.S. time zones and UTC
conversion dead link Canada
time zone map Time zones for major world cities Official times across Canada The official U.S. time for the Atlantic Time Zone
Atlantic Time Zone
(no DST) dead link

v t e

Time zones in North America

Time zone Hours from UTC: Standard time Hours from UTC: Daylight saving time

Hawaii–Aleutian (in Hawaii) –10 –10

Hawaii–Aleutian (in Alaska) –10 –9

Alaska –9 –8

Pacific –8 –7

Mountain (Arizona and Sonora only) –7 –7

Mountain (other states/provinces) –7 –6

Central (Saskatchewan only) –6 –6

Central (other states/provinces) –6 –5

Eastern (parts of Nunavut and the Caribbean) –5 –5

Eastern (other states/provinces) –5 –4

Atlantic (Natashquan River) –4 –4

Atlantic (other states/provinces) –4 –3

Newfoundland –3:30 –2:30

Saint Pierre and Miquelon and most of Greenland –3 –2

See also Time in Canada Time in Denmark Time in Mexico Time in the United States

v t e

Coordinated Universal Time
Coordinated Universal Time

offset for standard time and Daylight saving time
Daylight saving time
(DST) Italics: historical or unofficial

180° to < 90°W

−12:00 −11:00 −10:30 −10:00 −09:30 −09:00 −08:30 −08:00 −07:00

90°W to < 0°

−06:00 −05:00 −04:30 −04:00 −03:30 −03:00 −02:30 −02:00 −01:00 −00:44 −00:25:21

0° to < 90°E

±00:00 +00:20 +00:30 +01:00 +01:24 +01:30 +02:00 +02:30 +03:00 +03:30 +04:00 +04:30 +04:51 +05:00 +05:30 +05:40 +05:45

90°E to < 180°

+06:00 +06:30 +07:00 +07:20 +07:30 +08:00 +08:30 +08:45 +09:00 +09:30 +09:45 +10:00 +10:30 +11:00 +11:30

(180° to < 90°W)

+12:00 +12:45 +13:00 +13:45 +14:00

Time zone
Time zone
data sources

tz database

Lists of time zones

Time zones by country Time zones by UTC
offset tz database time zones Military time zones Time zone
Time zone
abbreviations Daylight savi