Offset
There is no time difference between Brasilia Time and Atlantic Time.
Brasilia Time (BRT) is currently the same time as Atlantic Time (ADT).
BRT: UTC-3
ADT: UTC-3
Atlantic Time is currently observing daylight saving time; Brasilia Time is not.
When to schedule
Business-hours overlap: 9 AM–5 PM in Brasilia Time (9 AM–5 PM in Atlantic Time).
Both teams are in working hours during this window on weekdays.
Suggested time: 1:00 PM Brasilia Time (1:00 PM Atlantic Time).
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
Brazil
- New Year's DayThu, Jan 1
- CarnivalMon, Feb 16
- CarnivalTue, Feb 17
- Good FridayFri, Apr 3
- Easter SundaySun, Apr 5
- TiradentesTue, Apr 21
- Labour DayFri, May 1
- Corpus ChristiThu, Jun 4
- Independence DayMon, Sep 7
- Our Lady of AparecidaMon, Oct 12
- All Souls' DayMon, Nov 2
- Republic Proclamation DaySun, Nov 15
- Black Awareness DayFri, Nov 20
- Christmas DayFri, Dec 25
Canada
- New Year's DayThu, Jan 1
- Good FridayFri, Apr 3
- Victoria DayMon, May 18
- Canada DayWed, Jul 1
- Labour DayMon, Sep 7
- National Day for Truth and ReconciliationWed, Sep 30
- ThanksgivingMon, Oct 12
- Christmas DayFri, Dec 25
About these zones
Brasilia Time is also known as BRT. To call Brazil, dial +55.
Atlantic Time is also known as AST, or ADT. To call Canada, dial +1.
Atlantic Time is approximately 4,850 miles north of Brasilia Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| BRT | AST-ATLANTIC | Day |
|---|---|---|
| 12:00 am | 12:00 am | Same day |
| 1:00 am | 1:00 am | Same day |
| 2:00 am | 2:00 am | Same day |
| 3:00 am | 3:00 am | Same day |
| 4:00 am | 4:00 am | Same day |
| 5:00 am | 5:00 am | Same day |
| 6:00 am | 6:00 am | Same day |
| 7:00 am | 7:00 am | Same day |
| 8:00 am | 8:00 am | Same day |
| 9:00 am | 9:00 am | Same day |
| 10:00 am | 10:00 am | Same day |
| 11:00 am | 11:00 am | Same day |
| 12:00 pm | 12:00 pm | Same day |
| 1:00 pm | 1:00 pm | Same day |
| 2:00 pm | 2:00 pm | Same day |
| 3:00 pm | 3:00 pm | Same day |
| 4:00 pm | 4:00 pm | Same day |
| 5:00 pm | 5:00 pm | Same day |
| 6:00 pm | 6:00 pm | Same day |
| 7:00 pm | 7:00 pm | Same day |
| 8:00 pm | 8:00 pm | Same day |
| 9:00 pm | 9:00 pm | Same day |
| 10:00 pm | 10:00 pm | Same day |
| 11:00 pm | 11:00 pm | Same day |
Daylight saving time
Atlantic Time observes daylight saving time; Brasilia Time does not. The offset between the two zones changes when Atlantic Time transitions: on Sunday, November 1, 2026, clocks fall back from ADT to AST.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 6:44 AM
- Sunset
- 5:28 PM
- Day length
- 10h 45m
- Sunrise
- 5:31 AM
- Sunset
- 8:56 PM
- Day length
- 15h 25m
Daylight overlap: 10h 45m — 6:44 AM–5:28 PM in Brasilia Time (6:44 AM–5:28 PM in Atlantic Time). Both locations are in daylight during this window.
Cities in these zones
Cities in Brasilia Time
Cities in Atlantic Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Brasilia Time
- CGH
- GRU
- GIG
- SDU
- CNF
- BSB
- CWB
- GYN
- POA
Airports in Atlantic Time
- YHZ
Related conversions
Common conversions
- What is 9:00 am BRT in AST-ATLANTIC?
- 9:00 am BRT is 9:00 am AST-ATLANTIC.
- What is 12:00 pm BRT in AST-ATLANTIC?
- 12:00 pm BRT is 12:00 pm AST-ATLANTIC.
- What is 12:30 pm BRT in AST-ATLANTIC?
- 12:30 pm BRT is 12:30 pm AST-ATLANTIC.
- What is 2:00 pm BRT in AST-ATLANTIC?
- 2:00 pm BRT is 2:00 pm AST-ATLANTIC.
- What is 5:00 pm BRT in AST-ATLANTIC?
- 5:00 pm BRT is 5:00 pm AST-ATLANTIC.
- What is 11:30 pm BRT in AST-ATLANTIC?
- 11:30 pm BRT is 11:30 pm AST-ATLANTIC.