ADT to St. John's Time Converter
ADT is not used on this date
This converter uses AST (GMT -4), the offset Moncton uses on this date. Open the AST converter.Quick answers
Selected conversion
The selected date and time will appear here when the converter loads.
How the time difference changes
For most of the year, ADT is 30 minutes behind St. John's. At other times of the year, AST is 30 minutes behind St. John's. Briefly around clock changes, ADT is 30 minutes ahead of St. John's or AST is 1 hour and 30 minutes behind St. John's.
For most of the year, working hours of 9:00 am to 5:00 pm in ADT correspond to 9:30 am to 5:30 pm in St. John's. At other times of the year, working hours of 9:00 am to 5:00 pm in AST correspond to 9:30 am to 5:30 pm in St. John's.
Compare ADT time with St. John's time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Atlantic Standard Time is 0 hours and 30 minutes behind NST (Newfoundland Standard Time)
8:00 am08:00 in AST is 8:30 am08:30 in St. John's, Canada
AST to St. John's call time
Best time for a conference call or a meeting is between 9am-4:30pm in AST which corresponds to 9:30am-5pm in St. John's
8:00 am08:00 Atlantic Standard Time (AST). Offset UTC -4:00 hours
8:30 am08:30 NST (Newfoundland Standard Time) (St. John's, Canada). Offset UTC -3:30 hours
8:00 am08:00 AST / 8:30 am08:30 St. John's, Canada
| AST | St. John's, Canada |
|---|---|
| 12am (midnight) | 12:30 am |
| 1am | 1:30 am |
| 2am | 2:30 am |
| 3am | 3:30 am |
| 4am | 4:30 am |
| 5am | 5:30 am |
| 6am | 6:30 am |
| 7am | 7:30 am |
| 8am | 8:30 am |
| 9am | 9:30 am |
| 10am | 10:30 am |
| 11am | 11:30 am |
| 12pm (noon) | 12:30 pm |
| 1pm | 1:30 pm |
| 2pm | 2:30 pm |
| 3pm | 3:30 pm |
| 4pm | 4:30 pm |
| 5pm | 5:30 pm |
| 6pm | 6:30 pm |
| 7pm | 7:30 pm |
| 8pm | 8:30 pm |
| 9pm | 9:30 pm |
| 10pm | 10:30 pm |
| 11pm | 11:30 pm |
| 00:00 | 00:30 |
| 01:00 | 01:30 |
| 02:00 | 02:30 |
| 03:00 | 03:30 |
| 04:00 | 04:30 |
| 05:00 | 05:30 |
| 06:00 | 06:30 |
| 07:00 | 07:30 |
| 08:00 | 08:30 |
| 09:00 | 09:30 |
| 10:00 | 10:30 |
| 11:00 | 11:30 |
| 12:00 | 12:30 |
| 13:00 | 13:30 |
| 14:00 | 14:30 |
| 15:00 | 15:30 |
| 16:00 | 16:30 |
| 17:00 | 17:30 |
| 18:00 | 18:30 |
| 19:00 | 19:30 |
| 20:00 | 20:30 |
| 21:00 | 21:30 |
| 22:00 | 22:30 |
| 23:00 | 23:30 |
Atlantic Daylight Time
Offset: ADT is 3 hours behind Greenwich Mean Time (GMT) and is used in North America
Countries using this time zone: Bermuda, Canada, Greenland
Principal Cities: The largest city in the ADT time zone is Halifax in Canada, with about 359,111 people. Other major cities in this time zone include 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, but some places set clocks back one hour during winter and observe Atlantic Standard Time (AST).
End: Atlantic Daylight Time (ADT) ended on Sunday, November 2, 2025 at 2:00 am local time and clocks were set one hour back to Sunday, November 2, 2025, 1:00 am local standard time instead. Daylight saving ends annually on the first Sunday of November
Start: Atlantic Daylight Time (ADT) starts on Sunday, March 8, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, March 8, 2026, 3:00 am. Daylight saving starts annually on the 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 an offset of three hours 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
- ADT - Atlantic Daylight Time
- PMT - Pierre & Miquelon Standard Time
- PMST - Pierre & Miquelon Standard Time
- AMST - Amazon Summer Time
- ART - Argentina Time
- BRT - Brasília 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
St. John's Information
Time Zone
NST - Newfoundland Standard Time
-3:30 hours during Newfoundland Standard Time.
Sunday, March 8, 2026 at 2:00 am local time. DST starts annually on the 2nd Sunday of March. Clocks are turned forward 1 hour to Sunday, March 8, 2026 at 3:00 am local daylight time instead. Also called Spring Forward or Summer Time.Sunday, November 1, 2026 at 2:00 am local time. DST ends annually on the 1st Sunday of November. Clocks are turned backward 1 hour to Sunday, November 1, 2026 at 1:00 am local standard time instead. Also called Fall Back or switch to Winter Time.