AST to PST to EST
Time Difference
Atlantic Daylight Time is 4 hours ahead of Pacific Daylight Time and 1 hour ahead of Eastern Daylight Time
4:00 pm16:00 in ADT is 12:00 pm12:00 in PDT and is 3:00 pm15:00 in EDT
AST to PST call time
Best time for a conference call or a meeting is between 12pm-6pm in AST which corresponds to 8am-2pm in PST
AST to EST call time
Best time for a conference call or a meeting is between 9am-6pm in AST which corresponds to 8am-5pm in EST
4:00 pm16:00 Atlantic Daylight Time (ADT). Offset UTC -3:00 hours
12:00 pm12:00 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
3:00 pm15:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
4:00 pm16:00 ADT / 12:00 pm12:00 PDT / 3:00 pm15:00 EDT
| ADT | PDT | EDT |
|---|---|---|
| 12am (midnight) | 8pm | 11pm |
| 1am | 9pm | 12am (midnight) |
| 2am | 10pm | 1am |
| 3am | 11pm | 2am |
| 4am | 12am (midnight) | 3am |
| 5am | 1am | 4am |
| 6am | 2am | 5am |
| 7am | 3am | 6am |
| 8am | 4am | 7am |
| 9am | 5am | 8am |
| 10am | 6am | 9am |
| 11am | 7am | 10am |
| 12pm (noon) | 8am | 11am |
| 1pm | 9am | 12pm (noon) |
| 2pm | 10am | 1pm |
| 3pm | 11am | 2pm |
| 4pm | 12pm (noon) | 3pm |
| 5pm | 1pm | 4pm |
| 6pm | 2pm | 5pm |
| 7pm | 3pm | 6pm |
| 8pm | 4pm | 7pm |
| 9pm | 5pm | 8pm |
| 10pm | 6pm | 9pm |
| 11pm | 7pm | 10pm |
| 0:00 | 20:00 | 23:00 |
| 1:00 | 21:00 | 0:00 |
| 2:00 | 22:00 | 1:00 |
| 3:00 | 23:00 | 2:00 |
| 4:00 | 0:00 | 3:00 |
| 5:00 | 1:00 | 4:00 |
| 6:00 | 2:00 | 5:00 |
| 7:00 | 3:00 | 6:00 |
| 8:00 | 4:00 | 7:00 |
| 9:00 | 5:00 | 8:00 |
| 10:00 | 6:00 | 9:00 |
| 11:00 | 7:00 | 10:00 |
| 12:00 | 8:00 | 11:00 |
| 13:00 | 9:00 | 12:00 |
| 14:00 | 10:00 | 13:00 |
| 15:00 | 11:00 | 14:00 |
| 16:00 | 12:00 | 15:00 |
| 17:00 | 13:00 | 16:00 |
| 18:00 | 14:00 | 17:00 |
| 19:00 | 15:00 | 18:00 |
| 20:00 | 16:00 | 19:00 |
| 21:00 | 17:00 | 20:00 |
| 22:00 | 18:00 | 21:00 |
| 23:00 | 19:00 | 22:00 |
Atlantic Standard Time
Offset: AST is 4 hours behind Greenwich Mean Time (GMT) and is used in North America
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
French: HNA - Heure Normale de l'Atlantique
Spanish: AST - Tiempo Estándar del Atlántico
Daylight Saving: This is a standard time zone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Atlantic Daylight Time (ADT).
End: Atlantic Standard Time (AST) has ended on Sunday, March 9, 2025 at 2:00 am local time and clocks were set one hour forward to Sunday, March 9, 2025, 3:00 am local daylight time instead. Standard time ends annually the on second Sunday of March.
Start: Atlantic Standard Time (AST) starts on Sunday, November 2, 2025 at 2:00 am local time and clocks are set one hour back to Sunday, November 2, 2025, 1:00 am. Standard time starts annually the on first Sunday of November.
AST representations, usage and related time zones
- -04 - basic short
- -0400 - basic
- -04:00 - extended
- -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.
- Quebec - Military abbreviation for AST
- Q - short form of 'Quebec'
- 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
- Atlantic Standard Time - UTC -4
- Arabia Standard Time - UTC +3
- Azerbaijan Standard Time - UTC +4
- Argentina Standard Time - UTC -3
- Azores Summer Time - UTC +0
- Apia Standard Time - UTC +13
- 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
Pacific Standard Time
Offset: PST is 8 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries: It is used in following countries: Canada, Mexico, United States
Principal Cities: The largest city in the PST timezone is Los Angeles from USA with population about 3.793 million people. Other major cities in the area are Vancouver, Tijuana, San Diego, San Jose
French: HNP - Heure Normale du Pacifique
Spanish: PT - Tiempo del Pacífico, PT - Zona Noroeste
Daylight Saving: This is a standard time zone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Pacific Daylight Time (PDT).
End: Pacific Standard Time (PST) has ended on Sunday, March 9, 2025 at 2:00 am local time and clocks were set one hour forward to Sunday, March 9, 2025, 3:00 am local daylight time instead. Standard time ends annually the on second Sunday of March.
Start: Pacific Standard Time (PST) starts on Sunday, November 2, 2025 at 2:00 am local time and clocks are set one hour back to Sunday, November 2, 2025, 1:00 am. Standard time starts annually the on first Sunday of November.
PST representations, usage and related time zones
- -08 - basic short
- -0800 - basic
- -08:00 - extended
- -0800 - sign character (-) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates eight hour and zero minutes time differences to the west of the zero meridian.
- Uniform - Military abbreviation for PST
- U - short form of 'Uniform'
- America/Ensenada
- America/Los_Angeles
- America/Santa_Isabel
- America/Tijuana
- America/Vancouver
- Canada/Pacific
- Mexico/BajaNorte
- PST8PDT
- US/Pacific
- Pacific Standard Time - UTC -8
- Pitcairn Standard Time - UTC -8
- Peru Standard Time - UTC -5
- AKDT - Alaska Daylight Time
- PST - Pacific Standard Time
- PT - Pacific Time
- PST - Pitcairn Standard Time
- U - Uniform Time Zone
Eastern Standard Time
Offset: EST is 5 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries: It is used in following countries: Bahamas, Canada, Haiti, Jamaica, Cayman Islands, Mexico, Panama, Turks & Caicos Is, United States
Principal Cities: The largest city in the EST timezone is New York City from USA with population about 8.175 million people. Other major cities in the area are Toronto, Montreal, Brooklyn, Borough of Queens
French: HNE - Heure Normale de l'Est
Spanish: ET - Tiempo del Este, ET - Zona Sureste
Daylight Saving: This is a standard time zone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Eastern Daylight Time (EDT).
End: Eastern Standard Time (EST) has ended on Sunday, March 9, 2025 at 2:00 am local time and clocks were set one hour forward to Sunday, March 9, 2025, 3:00 am local daylight time instead. Standard time ends annually the on second Sunday of March.
Start: Eastern Standard Time (EST) starts on Sunday, November 2, 2025 at 2:00 am local time and clocks are set one hour back to Sunday, November 2, 2025, 1:00 am. Standard time starts annually the on first Sunday of November.
EST representations, usage and related time zones
- -05 - basic short
- -0500 - basic
- -05:00 - extended
- -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates five hour and zero minutes time differences to the west of the zero meridian.
- Romeo - Military abbreviation for EST
- R - short form of 'Romeo'
- America/Atikokan
- America/Cancun
- America/Cayman
- America/Coral_Harbour
- America/Detroit
- America/Fort_Wayne
- America/Grand_Turk
- America/Indiana/Indianapolis
- America/Indiana/Marengo
- America/Indiana/Petersburg
- America/Indiana/Vevay
- America/Indiana/Vincennes
- America/Indiana/Winamac
- America/Indianapolis
- America/Iqaluit
- America/Jamaica
- America/Kentucky/Louisville
- America/Kentucky/Monticello
- America/Louisville
- America/Montreal
- America/Nassau
- America/New_York
- America/Nipigon
- America/Panama
- America/Pangnirtung
- America/Port-au-Prince
- America/Thunder_Bay
- America/Toronto
- Canada/Eastern
- EST
- EST5EDT
- Jamaica
- US/East-Indiana
- US/Eastern
- US/Michigan
- CDT - Central Daylight Time
- EST - Eastern Standard Time
- ET - Eastern Time
- COT - Colombia Time
- CST - Cuba Standard Time
- EASST - Easter Island Summer Time
- ECT - Ecuador Time
- PET - Peru Time
- R - Romeo Time Zone