AST Ast to ADT Converter
Time Difference
Argentina Standard Time is 1 hour ahead of Atlantic Standard Time
9:00 pm21:00 in AST is 8:00 pm20:00 in AST
AST to ADT call time
Best time for a conference call or a meeting is between 8am-6pm in AST which corresponds to 8am-6pm in ADT
9:00 pm21:00 Argentina Standard Time (AST). Offset UTC -3:00 hours
8:00 pm20:00 Atlantic Standard Time (AST). Offset UTC -4:00 hours
9:00 pm21:00 AST / 8:00 pm20:00 AST
AST | AST |
---|---|
12am (midnight) | 11pm |
1am | 12am (midnight) |
2am | 1am |
3am | 2am |
4am | 3am |
5am | 4am |
6am | 5am |
7am | 6am |
8am | 7am |
9am | 8am |
10am | 9am |
11am | 10am |
12pm (noon) | 11am |
1pm | 12pm (noon) |
2pm | 1pm |
3pm | 2pm |
4pm | 3pm |
5pm | 4pm |
6pm | 5pm |
7pm | 6pm |
8pm | 7pm |
9pm | 8pm |
10pm | 9pm |
11pm | 10pm |
0:00 | 23:00 |
1:00 | 0:00 |
2:00 | 1:00 |
3:00 | 2:00 |
4:00 | 3:00 |
5:00 | 4:00 |
6:00 | 5:00 |
7:00 | 6:00 |
8:00 | 7:00 |
9:00 | 8:00 |
10:00 | 9:00 |
11:00 | 10:00 |
12:00 | 11:00 |
13:00 | 12:00 |
14:00 | 13:00 |
15:00 | 14:00 |
16:00 | 15:00 |
17:00 | 16:00 |
18:00 | 17:00 |
19:00 | 18:00 |
20:00 | 19:00 |
21:00 | 20:00 |
22:00 | 21:00 |
23:00 | 22:00 |
Argentina Standard Time
Offset: AST is 3 hours behind Greenwich Mean Time (GMT) and is used in America
Countries: It is used in following countries: Bermuda, Canada, Greenland
Principal Cities: The largest city in the AST timezone is Halifax from Canada with population about 359,111 people. Other major cities in the area are Sydney, Dartmouth, Saint John, Moncton
AST representations, usage and related time zones
- -03 - basic short
- -0300 - basic
- -03:00 - extended
- -0300 - sign character (-) followed by a four digit time providing hours (03) and minutes (00) of the offset. Indicates three hour and zero minutes time differences to the west of the zero meridian.
- Papa - Military abbreviation for AST
- P - short form of 'Papa'
- Atlantic Standard Time - UTC -4
- Arabia Standard Time - UTC +3
- Argentina Standard Time - UTC -3
- Arabian Standard Time - UTC +3
- Azores Summer Time - UTC +0
- Apia Standard Time - UTC +13
- ADT - Atlantic Daylight Time
- PMT - Pierre & Miquelon Standard Time
- PMST - Pierre & Miquelon Standard Time
- WGT - West Greenland Time
- AMST - Amazon Summer Time
- ART - Argentina Time
- BRT - BrasÃlia time
- CLST - Chile Summer Time
- FKST - Falkland Islands Summer Time
- GFT - French Guiana Time
- P - Papa Time Zone
- PYST - Paraguay Summer Time
- SRT - Suriname Time
- UYT - Uruguay Time
Atlantic Daylight Time
Offset: ADT is 3 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries: It is used in following countries: Bermuda, Canada, Greenland
Principal Cities: The largest city in the ADT timezone is Halifax from Canada with population about 359,111 people. Other major cities in the area are Sydney, Dartmouth, Saint John, Moncton
French: HAA - Heure Avancée de l'Atlantique

Daylight Saving: Atlantic Daylight Time (ADT) is a daylight saving/summer time zone, however during winter some places adjust time for one hour back and observe Atlantic Standard Time (AST).
End: Atlantic Daylight Time (ADT) has ended on Sunday, November 5, 2023 at 2:00 am local time and clocks were set one hour back to Sunday, November 5, 2023, 1:00 am local standard time instead. Daylight saving ends annually the on first Sunday of November
Start: Atlantic Daylight Time (ADT) starts on Sunday, March 10, 2024 at 2:00 am local time and clocks are set one hour forward to Sunday, March 10, 2024, 3:00 am. Daylight saving starts annually the on second Sunday of March
ADT representations, usage and related time zones
- -03 - basic short
- -0300 - basic
- -03:00 - extended
- -0300 - sign character (-) followed by a four digit time providing hours (03) and minutes (00) of the offset. Indicates three hour and zero minutes time differences to the west of the zero meridian.
- Papa - Military abbreviation for ADT
- P - short form of 'Papa'
- America/Glace_Bay
- America/Goose_Bay
- America/Halifax
- America/Moncton
- America/Thule
- Atlantic/Bermuda
- Canada/Atlantic
- Atlantic Daylight Time - UTC -3
- Apia Daylight Time - UTC +14
- ADT - Atlantic Daylight Time
- PMT - Pierre & Miquelon Standard Time
- PMST - Pierre & Miquelon Standard Time
- WGT - West Greenland Time
- AMST - Amazon Summer Time
- ART - Argentina Time
- BRT - BrasÃlia time
- CLST - Chile Summer Time
- FKST - Falkland Islands Summer Time
- GFT - French Guiana Time
- P - Papa Time Zone
- PYST - Paraguay Summer Time
- SRT - Suriname Time
- UYT - Uruguay Time