Saint George's, Grenada To AST Caribbean - Savvy Time

Atlantic Standard Time

Offset: AST is 4 hours behind Greenwich Mean Time (GMT) and is used in Caribbean

Countries: It is used in following countries: Antigua & Barbuda, Anguilla, Aruba, Barbados, St Barthelemy, Bermuda, Caribbean NL, Canada, Curaçao, Dominica, Dominican Republic, Grenada, Greenland, Guadeloupe, St Kitts & Nevis, St Lucia, St Martin (French), Martinique, Montserrat, Puerto Rico, St Maarten (Dutch), Trinidad & Tobago, St Vincent, Virgin Islands (UK), Virgin Islands (US)

Principal Cities: The largest city in the AST timezone is Santo Domingo from Dominican Republic with population about 2.202 million people. Other major cities in the area are Santiago de los Caballeros, Santo Domingo Oeste, San Juan, Halifax

Daylight Saving: Atlantic Standard Time (AST) is not adjusted for daylight saving therefore AST remains the same through out the year. This means, unlike some time zones where the clock is set forward by one hour every summer and backward by one hour during winter to adjust for daylight saving, Atlantic Standard Time remains the same

AST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data

• -04 - basic short
• -0400 - basic
• -04:00 - extended

Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers

• -0400 - sign character (-) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates four hour and zero minutes time differences to the west of the zero meridian.

Military/NATO: Used by the U.S. military, Chinese military and others

• Quebec - Military abbreviation for AST
• Q - short form of 'Quebec'

IANA/Olson: Reflects AST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems

• America/Anguilla
• America/Antigua
• America/Aruba
• America/Barbados
• America/Blanc-Sablon
• America/Curacao
• America/Dominica
• America/Glace_Bay
• America/Goose_Bay
• America/Grenada
• America/Guadeloupe
• America/Halifax
• America/Kralendijk
• America/Lower_Princes
• America/Marigot
• America/Martinique
• America/Moncton
• 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
• America/Thule
• America/Tortola
• America/Virgin
• Atlantic/Bermuda
• Canada/Atlantic

AST Abbreviation: Several time zones share AST abbreviation and it could refer to these time zones

• Atlantic Standard Time - UTC -4
• Arabia Standard Time - UTC +3
• Arabian Standard Time - UTC +3
• Argentina Standard Time - UTC -3
• Azores Standard Time - UTC -1
• Apia Standard Time - UTC +13

Time zones with the GMT -4 offset:

• AST - Atlantic Standard Time
• EDT - Eastern Daylight Time
• AMT - Amazon Time
• BOT - Bolivia Time
• CDT - Cuba Daylight Time
• CLT - Chile Standard Time
• FKT - Falkland Island Time
• GYT - Guyana Time
• HLV - Hora Legal de Venezuela
• PYT - Paraguay Time
• Q - Quebec Time Zone
• VET - Venezuelan Standard Time