Primary city
San Juan
US time zone
Atlantic Time (Puerto Rico)
Puerto Rico and the U.S. Virgin Islands use Atlantic Standard Time year-round (no daylight saving).
AST UTC−4 year-round No daylight saving America/Puerto_Rico
Standard offset
UTC−4
Daylight saving
No
IANA id
America/Puerto_Rico
Major cities
- San Juan , PR
- Charlotte Amalie , VI
Related states & territories
Some states span multiple zones — these links cover places commonly associated with Atlantic Time.
Convert into Atlantic Time
Pick any city and local time — results highlight every U.S. zone, with Atlantic Time (Puerto Rico) called out.
Converting 12:00 in Tokyo, JP. Times use official IANA zones (DST applied automatically).
| U.S. zone | Local time | Date | Note |
|---|---|---|---|
| Eastern Time EST | — | — | — |
| Central Time CST | — | — | — |
| Mountain Time MST | — | — | — |
| Pacific Time PST | — | — | — |
| Alaska Time AKST | — | — | — |
| Hawaii–Aleutian Time HST · no DST | — | — | — |
| Arizona (Mountain Standard) MST · no DST | — | — | — |
| Atlantic Time (Puerto Rico) AST · no DST | — | — | — |
| Chamorro Time ChST · no DST | — | — | — |
| Samoa Standard Time SST · no DST | — | — | — |
Live clocks refresh about every 30s. Prefer a city page? Browse the U.S. time zones list.