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 06:04 in Tokyo, JP (GMT+9) → all U.S. zones. Times use official IANA zones (DST applied automatically).
| U.S. zone | Local time | Date | Note |
|---|---|---|---|
| Eastern Time EDT | 5:04 PM | Wed, Sep 16, 2026 | previous day |
| Central Time CDT | 4:04 PM | Wed, Sep 16, 2026 | previous day |
| Mountain Time MDT | 3:04 PM | Wed, Sep 16, 2026 | previous day |
| Pacific Time PDT | 2:04 PM | Wed, Sep 16, 2026 | previous day |
| Alaska Time AKDT | 1:04 PM | Wed, Sep 16, 2026 | previous day |
| Hawaii–Aleutian Time HST · no DST | 11:04 AM | Wed, Sep 16, 2026 | previous day |
| Arizona (Mountain Standard) MST · no DST | 2:04 PM | Wed, Sep 16, 2026 | previous day |
| Atlantic Time (Puerto Rico) AST · no DST | 5:04 PM | Wed, Sep 16, 2026 | previous day |
| Chamorro Time GMT+10 · no DST | 7:04 AM | Thu, Sep 17, 2026 | — |
| Samoa Standard Time GMT-11 · no DST | 10:04 AM | Wed, Sep 16, 2026 | previous day |
Live clocks refresh about every 30s (last tick 6:04 AM source-local). Prefer a city page? Browse the U.S. time zones list.