Brasília Time to Canada Atlantic Time
Convert times between Brasília Time (BRT, UTC-3:00) and Canada Atlantic Time (AST, UTC-4:00). Canada Atlantic Time is 1 hour behind Brasília Time in standard time. During daylight saving time this difference changes to 0 hours.
UTC-3:00→UTC-4:00 / -3:00
Live timezone converterUTC Offset Reference
| Timezone | Abbreviation | Standard offset | DST offset | Country |
|---|---|---|---|---|
| Brasília Time | BRT | UTC-3:00 | — | Brazil |
| Canada Atlantic Time | AST / ADT | UTC-4:00 | UTC-3:00 | Canada |
* DST offset applies during summer months. Exact transition dates vary by year.
Standard Time Conversion (BRT → AST)
| Brasília Time | Canada Atlantic Time |
|---|---|
| 12:00 AM BRT | 11:00 PM (prev day) AST |
| 6:00 AM BRT | 5:00 AM AST |
| 9:00 AM BRT | 8:00 AM AST |
| 12:00 PM BRT | 11:00 AM AST |
| 3:00 PM BRT | 2:00 PM AST |
| 6:00 PM BRT | 5:00 PM AST |
| 9:00 PM BRT | 8:00 PM AST |
Summer (DST) Conversion (BRT → ADT)
| Brasília Time (summer) | Canada Atlantic Time (summer) |
|---|---|
| 12:00 AM BRT | 12:00 AM ADT |
| 6:00 AM BRT | 6:00 AM ADT |
| 9:00 AM BRT | 9:00 AM ADT |
| 12:00 PM BRT | 12:00 PM ADT |
| 3:00 PM BRT | 3:00 PM ADT |
| 6:00 PM BRT | 6:00 PM ADT |
| 9:00 PM BRT | 9:00 PM ADT |
Daylight Saving Time (DST) Notes
- Canada Atlantic Time observes DST. Clocks advance 1 hour to ADT (UTC-3:00) roughly from month 3 to 11.
- The offset difference shifts between 1h (standard) and 0h (DST season). Always verify the current offset using the live converter below.
Frequently Asked Questions
How do I convert BRT to AST?
Add (-1) hours to the BRT time to get AST. For example, 9:00 AM BRT = 8:00 AM AST.
What is the current UTC offset for Brasília Time?
Brasília Time is always UTC-3:00 (BRT) — it does not observe DST.
Is Canada Atlantic Time ahead or behind Brasília Time?
Canada Atlantic Time is 1 hour behind Brasília Time in standard time.
When is a good time to schedule a meeting between BRT and AST?
A good overlap window is around 12:00 PM BRT / 11:00 AM AST, which falls within business hours for both timezones.
Related Timezone Conversions
Brasília Time → US Eastern TimeBRT / ESTBrasília Time → US Central TimeBRT / CSTBrasília Time → US Mountain TimeBRT / MSTBrasília Time → US Pacific TimeBRT / PSTBrasília Time → US Alaska TimeBRT / AKSTBrasília Time → Hawaii TimeBRT / HSTBrasília Time → Argentina TimeBRT / ARTBrasília Time → Colombia TimeBRT / COT
Need the exact current time?
Use the live ToolsHub timezone converter to see current times, DST status, and schedule across time zones.