Atlantic Time Zone

The Atlantic Time Zone is a geographical region that keeps standard time—called Atlantic Standard Time (AST)—by subtracting four hours from Coordinated Universal Time (UTC), resulting in UTC−04:00. During part of the year, some portions of the zone observe daylight saving time, referred to as Atlantic Daylight Time (ADT), by moving their clocks forward one hour to result in UTC−03:00. The clock time in this zone is based on the mean solar time of the 60th meridian west of the Greenwich Observatory.

In Canada, the provinces of New Brunswick,[1] Nova Scotia,[2] and Prince Edward Island are in this zone, though legally they calculate time specifically as an offset of four hours from Greenwich Mean Time (GMT–4) rather than from UTC. Small portions of Quebec (eastern Côte-Nord and the Magdalen Islands) also observe Atlantic Time. Officially, the entirety of Newfoundland and Labrador observes Newfoundland Standard Time,[3] but in practice Atlantic Time is used in most of Labrador.

No portion of the continental United States currently uses Atlantic Time, although it is used by the territories of Puerto Rico and the U.S. Virgin Islands. A number of New England states are considering a regional change to Atlantic Standard Time year-round (with no observance of daylight saving 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 in the process of enacting a similar change; in both cases any changes will need to be approved by the United States Department of Transportation and the United States Congress.

Atlantic Time Zone
UTC offset
Current time
14:46, 19 April 2019 ADT [refresh]
Observance of DST
DST is observed in parts of this time zone.

Areas covered

U.S. states considering a change to Atlantic Standard Time

A Massachusetts commission concluded in 2017 that the benefits of changing to Atlantic Standard Time year-round would outweigh the disadvantages, provided that a majority of northeastern states made the same change.[4] In May 2017, the Maine Senate approved a change to AST, on the condition that there would be a referendum, and that Massachusetts and New Hampshire decided to make the same switch.[5] Also in 2017, the New Hampshire House of Representatives approved a bill in favour of a regional change, but this was voted down by the state's Senate.[6] Similar bills have been put forward in Connecticut and Rhode Island.[5]

In 2018, Florida enacted into law the "Sunshine Protection Act", under which the state would observe daylight saving time year-round. Most of the state would permanently keep Eastern Daylight Time, which is equivalent to Atlantic Standard Time; the state's panhandle region would move to year-round Central Daylight Time / Eastern Standard Time.[7][8] However, the change cannot take effect until it is passed into federal law by the United States Congress.[8]

See also


  1. ^ "CHAPTER T-6 – Time Definition Act" (PDF). Archived from the original (PDF) on 2008-12-07. Retrieved 2012-09-11.
  2. ^ "Time Definition Act". Archived from the original on 5 June 2008. Retrieved 2008-06-02.
  3. ^ "RSNL1990 CHAPTER S-23 – STANDARD TIME ACT". Retrieved 2007-11-16.
  4. ^ "Commission: Massachusetts Should Change Time Zones, But Not On Its Own". November 1, 2017. Retrieved March 15, 2018.
  5. ^ a b "Maine Considers Atlantic Standard Time". Retrieved March 15, 2018.
  6. ^ "Senate votes down push to switch N.H.'s time zone". May 11, 2017. Retrieved March 15, 2018.
  7. ^ "Should Florida keep Daylight Saving Time all year? It could happen". miamiherald. Retrieved 2019-03-12.
  8. ^ a b Lemongello, Steven. "Florida's year-round daylight saving time law on hold in Congress". Retrieved 2019-03-12.

External links

63rd meridian west

The meridian 63° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Greenland, North America, the Atlantic Ocean, South America, the Southern Ocean, and Antarctica to the South Pole.

The 63rd meridian west forms a great circle with the 117th meridian east.

In the Canadian province of Quebec, the 63rd meridian is used as a time zone boundary, with all land to its west falling within the Eastern Time Zone and all land to its east in the Atlantic Time Zone.

CBC News Network

CBC News Network (formerly CBC Newsworld) is a Canadian English-language news channel owned and operated by the Canadian Broadcasting Corporation (CBC). It broadcasts into over 10 million homes in Canada, and is a Category C specialty channel. It is the world's third-oldest television service of this nature, after CNN in the United States and Sky News in the United Kingdom.

CBC News Network's French-language counterpart is Ici RDI, also owned by the CBC.


CBHT-DT is the CBC Television owned-and-operated television station in Halifax, Nova Scotia, Canada. It broadcasts a digital, high-definition, terrestrial over-the-air signal on UHF channel 39, from a transmitter located on Washmill Lake Drive (near Bently Drive) in Halifax. It also became Cape Breton Island's CBC station, when CBIT-TV was closed in 2012 as part of the CBC's digital transition.

Owned by the Canadian Broadcasting Corporation, it serves as the network's Atlantic Time Zone flagship station. The station broadcasts the CBC network schedules in local time, except during live events. Its studios and master control centre are located on 7067 Chebucto Road in Halifax. The station can also be seen on EastLink TV channel 11 (some systems carry the station on channel 5) and Bell Aliant TV channel 3. There is a high definition feed offered on Eastlink TV digital channel 601, Bell Aliant TV channel 400 and Bell TV Channel 1010. On Shaw Direct, the channel is available on 300 (Classic) or 58 (Advanced), and in high definition on channel 51 (Classic) or 551 (Advanced).

CTV National News

CTV National News is CTV's flagship newscast, which airs at 11:00 pm local time on the CTV stations across Canada. It also airs on CTV News Channel, CTV's 24-hour cable news television channel, live at 10:00 pm Eastern—or 11:00 Atlantic, when the newscast begins its nightly run across the network—with hourly repeats until 2:00 am Eastern (11:00 pm Pacific). The previous day's newscast can be seen on the Internet. The anchors are Lisa LaFlamme on weekdays, and Sandie Rinaldo on weekends. The program is also broadcast in High-Definition.

LaFlamme succeeded longtime weekday anchor Lloyd Robertson during the second half of 2011, following Robertson's retirement. Substitute anchors include Rinaldo (for weekday broadcasts), Kevin Newman, Beverly Thomson, Ken Shaw, Dan Matheson, Scott Laurie, Marci Ien, Todd van der Heyden, Marcia MacMillan, Jon Erlichman and Omar Sachedina.

The title CTV National News was rarely used in the 1990s and early 2000s; weeknights, the program was called CTV News with Lloyd Robertson and on the weekends, CTV News with Sandie Rinaldo. The title CTV National News was reintroduced in 2008, because CTV News has become the name of both the national and local news on CTV owned-and-operated (O&O) stations, although the banner continues to bear the title CTV News.

The newscast ran for 20 minutes until it was expanded to a half-hour in the 1980s. Prior to 1992, the newscast ran a perennial second in national news ratings to CBC Television's The National. In that year, its ratings jumped significantly after the CBC's unsuccessful renaming of its newscast as Prime Time News. CTV National News became the top-rated newscast for the first time in its history.Local newscasts are never broadcast nationally. Stories from local stations that have national importance are taken from the local O&O, and a 'national reporter' re-does the story, often from a location hundreds or even thousands of miles from the location of the story. The national reporter always mentions their name and location where they are based at the end of the story, even though that location is often different from the location of the story.

Until September 1998, CTV National News aired at midnight in the Maritime provinces. This was because CTV National News only produced one edition for the entire network, which aired live at 11:00 pm EST. When CTV Atlantic was purchased by Baton Broadcasting in 1997, one of the improvements was for CTV News to produce a second edition of the national newscast that would air in the Atlantic time zone at 11:00 pm. CTV National News moved to its new time in September 1998.Various promotional ads have claimed it to be "Canada's #1 Newscast" (consistent with CTV's boast that it is "Canada's #1 Network"); however, it has faced competition with Global Television Network's Global National and CBC News' The National in the ratings. The three newscasts air at different times (Global National at 5:30 p.m., The National at 10:00 p.m., and CTV National News at 11:00 p.m.). CTV's claim to first place is based on a seven-day comparison of the newscasts' original broadcast-network airings.CTV National News is not the same as CTV Evening News, a title that appears in some national ratings reports and is sometimes erroneously associated with the 11:00 p.m. newscast. The Evening News is not a single newscast but the national aggregate of CTV O&Os' local 6:00 p.m. newscasts. (All networks have their O&Os' local newscasts aggregated for national ratings purposes.)

Chamorro Time Zone

The Chamorro Time Zone, formerly the Guam Time Zone, is a United States time zone which observes standard time ten hours ahead of Coordinated Universal Time (UTC+10:00). The clock time in this zone is based on the mean solar time of the 150th meridian east of the Greenwich Observatory.

The zone includes the U.S. territories of Guam and the Northern Mariana Islands, where the Chamorro people are the original inhabitants. Since Daylight Saving Time (DST) is not observed anywhere in this zone, the time is always known as Chamorro Standard Time (ChST).

The zone is two hours behind Wake Island Time Zone and 15 hours ahead of North American Eastern Time Zone.

Chamorro Standard Time shares the same time as Australian Eastern Standard Time.


Côte-Nord (French pronunciation: ​[kot nɔʁ], French for "North Shore", area 247,633.94 km²) is the second largest administrative region by land area in Quebec, Canada, after Nord-du-Québec. It covers much of the northern shore of the Saint Lawrence River estuary and the Gulf of Saint Lawrence past Tadoussac.

While most of the region is in the same time zone as the rest of Quebec, the far eastern portion east of the 63rd meridian, including half of Anticosti Island, is officially in the Atlantic Time Zone.

Eastern Time Zone

The Eastern Time Zone (ET) is a time zone encompassing part or all of 22 states in the eastern part of the contiguous United States, parts of eastern Canada, the state of Quintana Roo in Mexico, Panama in Central America, and the Caribbean Islands.

Places that use Eastern Standard Time (EST) when observing standard time (autumn/winter) are 5 hours behind Coordinated Universal Time (UTC−05:00).

Eastern Daylight Time (EDT), when observing daylight saving time DST (spring/summer) is 4 hours behind Coordinated Universal Time (UTC−04:00).

In the northern parts of the time zone, on the second Sunday in March, at 2:00 a.m. EST, clocks are advanced to 3:00 a.m. EDT leaving a one-hour "gap". On the first Sunday in November, at 2:00 a.m. EDT, clocks are moved back to 1:00 a.m. EST, thus "duplicating" one hour. Southern parts of the zone (Panama and the Caribbean) do not observe daylight saving time.

Newfoundland Time Zone

The Newfoundland Time Zone (NT) is a geographic region that keeps time by subtracting ​3 1⁄2 hours from Coordinated Universal Time (UTC) during standard time, resulting in UTC−03:30; or subtracting ​2 1⁄2 hours during daylight saving time. The clock time in this zone is based on the mean solar time of the meridian 52 degrees and 30 arcminutes west of the Greenwich Observatory.

Pacific Time Zone

The Pacific Time Zone (PT) is a time zone encompassing parts of western Canada, the western United States, and western Mexico. Places in this zone observe standard time by subtracting eight hours from Coordinated Universal Time (UTC−08:00). During daylight saving time, a time offset of UTC−07:00 is used.

In the United States and Canada, this time zone is generically called the "Pacific Time Zone". Specifically, time in this zone is referred to as "Pacific Standard Time" (PST) when standard time is being observed (early November to mid-March), and "Pacific Daylight Time" (PDT) when daylight saving time (mid-March to early November) is being observed. In Mexico, the corresponding time zone is known as the Zona Noroeste (Northwest Zone) and observes the same daylight saving schedule as the U.S. and Canada. The largest city in the Pacific Time Zone is Los Angeles; the city’s metropolitan area is the largest in this time zone.

The zone is two hours ahead of the Hawaii–Aleutian Time Zone, one hour ahead of the Alaska Time Zone, one hour behind the Mountain Time Zone, two hours behind the Central Time Zone, three hours behind the Eastern Time Zone, and four hours behind the Atlantic Time Zone.

Pointe-Sapin, New Brunswick

Pointe-Sapin is a settlement on the northern coast of New Brunswick on the Northumberland Strait in the Gulf of the St. Lawrence. As a designated place in the 2011 Census, it had a population of 350 living in 165 of its 192 total private dwellings. Pointe-Sapin lies in the Atlantic Time Zone (AST/ADT) and observes daylight saving time.

Samoa Time Zone

The Samoa Time Zone observes standard time by subtracting eleven hours from Coordinated Universal Time (UTC-11). The clock time in this zone is based on the mean solar time of the 165th meridian west of the Greenwich Observatory.

The zone includes the U.S. territory of American Samoa, as well as the Midway Islands and the uninhabited islands of Jarvis, Palmyra, and Kingman Reef. It also includes the country of Niue.

The zone is one hour behind Hawaii-Aleutian Time Zone and one hour ahead of the Howland and Baker islands, and 23 hours behind Wake Island Time Zone.

The nation of Samoa also observed the same time as the Samoa Time Zone until it moved across the International Date Line at the end of 29 December 2011; it is now 24 hours (25 hours in southern hemisphere summer) ahead of American Samoa.

Shubenacadie Sam

Shubenacadie Sam is a famous Canadian groundhog who lives at the Shubenacadie Wildlife Park in the town of Shubenacadie, Nova Scotia. Every February 2, on Groundhog Day, Sam's shadow is closely observed at 08:00 AST to make the traditional prediction whether there will be an early spring. Due to Nova Scotia's Atlantic Time Zone, Sam makes the first Groundhog Day prediction in North America.The prediction ceremony is heralded by a bagpiper and town crier and draws an early-morning festive crowd of families and visitors.

This Morning (radio program)

This Morning was a Canadian radio program which aired from 1997 to 2002 on CBC Radio One. It was not always successful with CBC audiences, and underwent several format and hosting changes during its lifetime.The program was devised as a replacement for Morningside following Peter Gzowski's retirement from the network. It aired weekday and Sunday mornings from 9 a.m. to noon, also replacing Ian Brown's Sunday Morning. The program was hosted in its first two years by Michael Enright and Avril Benoit.The program was generally perceived by critics as an expanded Sunday Morning rather than a successor to Morningside. Listener reaction to Benoit was particularly polarized, with Benoit herself noting that "I've been accused of being dour, earnest, biased, distant, cool and flippant, all in the same package of letters."Enright became the show's sole host in 1999, and Benoit moved on to CBC Radio's local afternoon program in Toronto, Here and Now. In 2000, the CBC discontinued the six-day format. The Sunday broadcast once again became a separate program hosted by Enright, The Sunday Edition, and Shelagh Rogers became the weekday host of This Morning.Following the September 11 attacks on the World Trade Centre in New York City, the program faced some criticism for the flaws its format revealed in CBC Radio's ability to respond to a breaking news story. Because the program had been prerecorded for its Atlantic Time Zone airing, and was airing in tape delay in the Eastern Time Zone while all of the stations in Western Canada were still airing their local morning shows, the network had no viable way to interrupt programming in advance of its regular news break, and thus opted to wait until 10 a.m. EST to begin its coverage of the attacks.In part as a response to the criticism, the program was cancelled in 2002 and split into two new morning programs, The Current for hard news and Sounds Like Canada for human interest and documentary features. Anna Maria Tremonti became host of The Current, while Rogers remained as host of Sounds Like Canada.

Time in Canada

Canada is divided into six time zones, based on proposals by Scottish Canadian railway engineer Sir Sandford Fleming, who pioneered the use of the 24-hour clock, the world's time zone system, and a standard prime meridian. Most of Canada operates on standard time from the first Sunday in November to the second Sunday in March and daylight saving time the rest of the year.

Time in Maine

Time in Maine, as in all US states, is regulated by the United States Department of Transportation. All of Maine is in the Eastern Time Zone (ET) and observes daylight saving time (DST).

Eastern Maine has the earliest solar noon of the contiguous United States, and the portion of the state that is east of 67.5°W longitude is geographically in the Atlantic Time Zone, which is used by adjacent New Brunswick, Canada. Independent of daylight saving time, solar noon at the March equinox is approximately 11:50 in the southwestern part of the state, and 11:35 at West Quoddy Head Light, the easternmost point of the contiguous United States.

During winter, sunset can occur in some areas as early as 3:42 p.m. Most of the New England states have considered using the Atlantic Time Zone without daylight saving to mitigate this. In 2005, the Maine Legislature considered switching the entire state to Atlantic Standard Time all year long and eliminating daylight saving time. The bill did not pass.

Time in Rhode Island

Time in Rhode Island, as in all US states, is regulated by the United States Department of Transportation. Rhode Island is in the Eastern Time Zone (ET) and observes daylight saving time (DST).

Independent of daylight saving time, solar noon in Rhode Island on the March equinox is about 11:53, which is earlier than most areas of the United States. The state is small enough that geographical location only results in a difference of a few minutes.

Like the other five New England states, which also use the Eastern Time Zone, sunset in the winter in Rhode Island can occur as early as 4:30 p.m. Most of the New England states have considered using the Atlantic Time Zone without daylight saving to mitigate this. While Rhode Island considered such a bill in 2016, it would only take effect if Massachusetts did the same.

Time in the United States Virgin Islands

The United States Virgin Islands use the Atlantic Time Zone with no daylight saving time, due to how close it is to the equator. This is also true in Puerto Rico.

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 (in Alaska) –8 –8
Pacific (other states/provinces) –8 –7
Mountain (Arizona, Sonora, and Northeastern British Columbia 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
UTC offset for standard time and
Daylight saving time (DST)
Italics: historical or unofficial
Time zone data sources
Lists of time zones

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