Atlantic Standard Time has not had daylight saving time since 1945.
The IANA time zone identifiers for Atlantic Standard Time are America/Anguilla, America/Antigua, America/Aruba, America/Barbados, America/Blanc-Sablon, America/Curacao, America/Dominica, America/Grenada, America/Guadeloupe, America/Kralendijk, America/Lower_Princes, America/Marigot, America/Martinique, America/Montserrat, America/Port_of_Spain, America/Puerto_Rico, America/Santo_Domingo, America/St_Barthelemy, America/St_Kitts, America/St_Lucia, America/St_Thomas, America/St_Vincent と America/Tortola.