Puerto Rico Time Zone Map
Atlantic Standard Time (UTC−4) all year, with no daylight saving.
Time zones in Puerto Rico
| Zone | IANA | Standard | Daylight | Abbr |
|---|---|---|---|---|
| Puerto Rico | America/Puerto_Rico | — (no DST) |
Puerto Rico keeps Atlantic Standard Time (AST, UTC−4) all year and does not observe daylight saving time. That puts it on the same clock as New York from March to November, while the mainland is on Eastern Daylight Time, and one hour ahead of New York from November to March.
Neighbours and travel
The U.S. Virgin Islands also keep Atlantic Standard Time all year, so San Juan and Charlotte Amalie share a clock. The Dominican Republic, across the Mona Passage, is on Atlantic Standard Time as well. The IANA time zone database lists Puerto Rico as America/Puerto_Rico.
Frequently asked questions
What time zone is Puerto Rico in?
Atlantic Standard Time (AST), UTC−4, all year. The IANA zone is America/Puerto_Rico.
Does Puerto Rico observe daylight saving time?
No. Its clocks never change, so it matches New York in summer and is one hour ahead of New York in winter.
What time zone is San Juan in?
San Juan uses Atlantic Standard Time (UTC−4) year-round, like the rest of Puerto Rico.
Sources: zone boundaries from the U.S. Department of Transportation’s time zone regulations (49 CFR Part 71); offsets and daylight saving rules from the IANA time zone database. See Data Sources for how this site uses them.