BRT to AST Converter
AST is 1 hour behind BRT. 9:00 AM BRT = 8:00 AM AST.
AST is 1 hour behind BRT at the moment. To convert BRT to AST, subtract 1 hour from the BRT time: 9:00 AM BRT = 8:00 AM AST.
BRT (Brasília Time) is used in Brasília, São Paulo, Rio de Janeiro. AST (Atlantic Time) is used in Nova Scotia, New Brunswick, PEI; Puerto Rico and the Eastern Caribbean (all year).
AST here is Atlantic Standard Time, not Arabia Standard Time.
BRT to AST time conversion table
BRT to AST on 6 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| BRT | AST | Day |
|---|---|---|
| 12:00 AM BRT | 11:00 PM AST | previous day |
| 1:00 AM BRT | 12:00 AM AST | night |
| 2:00 AM BRT | 1:00 AM AST | night |
| 3:00 AM BRT | 2:00 AM AST | night |
| 4:00 AM BRT | 3:00 AM AST | night |
| 5:00 AM BRT | 4:00 AM AST | night |
| 6:00 AM BRT | 5:00 AM AST | night |
| 7:00 AM BRT | 6:00 AM AST | — |
| 8:00 AM BRT | 7:00 AM AST | — |
| 9:00 AM BRT | 8:00 AM AST | — |
| 10:00 AM BRT | 9:00 AM AST | work hours |
| 11:00 AM BRT | 10:00 AM AST | work hours |
| 12:00 PM BRT | 11:00 AM AST | work hours |
| 1:00 PM BRT | 12:00 PM AST | work hours |
| 2:00 PM BRT | 1:00 PM AST | work hours |
| 3:00 PM BRT | 2:00 PM AST | work hours |
| 4:00 PM BRT | 3:00 PM AST | work hours |
| 5:00 PM BRT | 4:00 PM AST | — |
| 6:00 PM BRT | 5:00 PM AST | — |
| 7:00 PM BRT | 6:00 PM AST | — |
| 8:00 PM BRT | 7:00 PM AST | — |
| 9:00 PM BRT | 8:00 PM AST | — |
| 10:00 PM BRT | 9:00 PM AST | — |
| 11:00 PM BRT | 10:00 PM AST | night |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert BRT to AST
Subtract 1 hour from the BRT time to get AST.
Example: 9:00 AM BRT = 8:00 AM AST.
Across midnight: 12:00 AM BRT = 11:00 PM AST (previous day). The date changes, so always check the day as well as the hour.
Time difference between BRT and AST
The time difference between BRT and AST is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 31 Dec 2025 – 7 Mar 2026: AST is 1 hour behind of BRT.
- 8 Mar 2026 – 31 Oct 2026: AST and BRT are on the same time.
- 1 Nov 2026 – 30 Dec 2026: AST is 1 hour behind of BRT.
BRT and AST during daylight saving time
- BRT does not observe daylight saving time; it stays on UTC−3 all year.
- AST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from AST (UTC−4) to ADT (UTC−3).
Best time for a meeting between BRT and AST
BRT and AST share 7 hours of the 9 AM–5 PM working day. Any time between 10:00 AM and 5:00 PM BRT lands between 9:00 AM and 4:00 PM AST, inside working hours for both.
BRT to AST FAQ
What is the time difference between BRT and AST?
Right now AST is 1 hour behind BRT. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM BRT in AST?
9:00 AM BRT is 8:00 AM AST.
What is 12 PM (noon) BRT in AST?
12:00 PM BRT is 11:00 AM AST.
Is AST ahead of or behind BRT?
AST is 1 hour behind BRT, so it is earlier in AST than in BRT.
Does BRT change for daylight saving time?
No. BRT stays on the same offset all year, so conversions never shift for daylight saving time.
Does AST change for daylight saving time?
Yes. AST next changes on 14 Mar 2027, when clocks go forward one hour from AST to ADT.
What is the best time for a meeting between BRT and AST?
BRT and AST share 7 hours of the 9 AM–5 PM working day. Any time between 10:00 AM and 5:00 PM BRT lands between 9:00 AM and 4:00 PM AST, inside working hours for both.
Related conversions
Convert AST to BRT
Convert BRT to other time zones
Convert other time zones to AST
Learn more
Updated 6 November 2026. Time zone data: IANA tz database.