What is the time difference between AST and BRT?

BRT is 1h 0m ahead of AST. AST is UTC-4 and BRT is UTC-3.

Does AST change for daylight saving time?

AST is a fixed offset of UTC-4 and does not itself change for daylight saving time.

BRT is 1h 0m ahead of AST. When it's 12:00 PM AST, it's 1:00 PM BRT.

From

AST · UTC-4

12:09:47AM

Atlantic Standard Time

BRT · UTC-3

1:09:47AM

Brasília Time

9:00 AM AST=10:00 AM BRT

12:00 PM AST=1:00 PM BRT

5:00 PM AST=6:00 PM BRT

Shaded rows are within standard working hours (8am–6pm) on both sides.

What is the time difference between AST and BRT?: BRT is 1h 0m ahead of AST. AST is UTC-4 and BRT is UTC-3.
What is 12:00 PM AST in BRT?: 12:00 PM AST is 1:00 PM BRT.
Does AST change for daylight saving time?: AST is a fixed offset of UTC-4 and does not itself change for daylight saving time.