AST Time Now

06:10:41

Sunday, November 8, 2026

AST is in use right now in Atlantic Time (UTC−4).

AST is 3 hours ahead of MST (Mountain Standard Time).

Atlantic Time

Atlantic Standard Time (AST)

IANA: America/Puerto_Rico · UTC−4

AST does not use daylight saving time. The offset stays UTC−4 all year.

Sunrise 06:27 · Sunset 17:49

Daylight 11h 22m · Solar noon 12:08

What time zone is AST in?

AST is on Atlantic Time (AST, UTC−4). The IANA identifier is America/Puerto_Rico.

No. AST keeps UTC−4 all year, so its time difference with places that do change their clocks shifts by an hour twice a year.

What time zone is AST in?

Atlantic Time (AST), UTC−4; IANA zone America/Puerto_Rico.

Does AST have daylight saving time?

No, it stays on UTC−4 all year.