HAA meaning in Regional ?

Answer: What is Heure Avancée de l'Atlantique mean?

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, Nova Scotia, 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, 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. In the 2010s, several U.S. states considered legislation to move from the Eastern Time Zone to Atlantic Standard Time. Any changes must be approved by the United States Department of Transportation and the United States Congress before taking legal effect.

The National Hurricane Center's official advisories typically report AST and UTC when tracking storms in the Caribbean that threaten the U.S., which may confuse the mainland public not familiar with the time zone designation.

reference

Full Form	Category
Harvard Alumni Association	Academic & Science
Harvard Athletic Association	Academic & Science
Hungarian Astronomical Association	Academic & Science
Hastings Architecture Associates	Academic & Science
Hillsboro Aero Academy	Academic & Science
Haloacedic Acid A	Academic & Science
Haloacetic Acid And	Academic & Science
Magyar Csillagászati Egyesület	Academic & Science
Magyar Csillag?zati Egyes?et	Academic & Science
Hasvik	Airport Code
Home Automation Association	Business
Haloacetic Acid	Chemistry
Histiocytosis Association of America	Community
Hinsdale Adventist Academy	Community
Hospice Association of America	Community
Hispanics Across America	Community
Harvard Athletic Associaton	Community
Houston Apartment Association	Community
Haunted Attraction Association	Community
Havyaka Association of Americas	Community
History of Art and Architecture	Community
Houston Apartment Association's	Community
Historic Action Adventure	Computing
Horror Action Adventure	Computing
Hsanz Anzsbt Asth	General
Houston Apartment	General
Hamilton Anderson Associates	General
Heterocyclic Aromatic Amines	General
Helicopter Alighting Area	General
Alif Atoll	General
Hungry After All	General
Historically Accurate Appearances	General
Hill Ascent Assist	General
Honda Access Asia	General
Hormonally Active Agent	General
Honda Access America	General
Historic Auto Attractions	General
Headrests Adjustable on All Seats	General
Height Above Airport	Governmental
Heavy Anti Archiver	Governmental
Houston Arts Alliance	Governmental
Home Acoustics Alliance	Governmental
HARWADA	Indian Railway Station
Hepatitis- Associated Antigen	Medical
Hepatitis Associated Antibodies	Medical
Health Action Area	Medical
Hospital Activity Analysis	Medical
Hepatitis-Associated Antibody	Medical
Heavy Anti-aircraft	Military and Defence
Hasvik, Norway	Regional
HAN: a language of the United States	Regional
Hepatitis Australian Antigen	Regional
Heure Avancée de l'Atlantique	Regional
Heure Avanc? de l'Atlantique	Regional
High Altitude Airship	Space Science
High Altitude Abort	Space Science
Hampton Athletic Association	Sports