Americas · Caribbean · Dependency
Current time in Puerto Rico
A single time zone at UTC-04:00.
Wednesday, October 14, 2026
About Puerto Rico's time
A single time zone.
Puerto Rico operates on Atlantic Standard Time (UTC-4) year-round with no daylight saving time changes, making it easy to keep track of time whether you're on the island or coordinating with the U.S. mainland.
Major cities
Cities of Puerto Rico.
History
How Puerto Rico keeps time.
Puerto Rico has used Atlantic Standard Time (AST, UTC-4) since March 1899, shortly after the U.S. acquired the island in 1898. Apart from wartime time in 1942–1945, its clocks have not changed since. Unlike most U.S. states, Puerto Rico does not observe daylight saving time, so its time matches the U.S. East Coast during daylight saving months (March to November) and is one hour ahead of it in winter.
Did you know?
Things about Puerto Rico's time.
Puerto Rico's year-round UTC-4 clock creates a simple but slightly unusual dynamic with the U.S. mainland. During daylight saving time (March to November), the island shares the same time as New York, Miami and the rest of the East Coast; from November to March it is one hour ahead of them. Puerto Ricans never adjust their clocks when the mainland shifts twice yearly.
Convert
Puerto Rico to the world's clocks.
Frequently asked questions
Common questions about Puerto Rico's time zone, daylight saving rules, and how to handle it in software. Can't find what you need? Email [email protected].
- Does Puerto Rico observe daylight saving time?
- No, Puerto Rico stays on Atlantic Standard Time (AST, UTC-4) year-round with no daylight saving time changes.
- What is the time difference between Puerto Rico and the U.S. mainland?
- During U.S. daylight saving time (March to November), Puerto Rico matches Eastern Time. From November to March, it is one hour ahead of Eastern Time.
- What timezone is Puerto Rico in?
- Puerto Rico is in the Atlantic Standard Time (AST) zone, which is UTC-4 and has no daylight saving time observance.
- Why doesn't Puerto Rico observe daylight saving time?
- Because Puerto Rico is located at a latitude where daylight hours don't vary significantly throughout the year, making daylight saving time largely unnecessary for the island.
- Can I use the same time as Florida when traveling between Puerto Rico and Miami?
- Only from March to November, when Miami is on Eastern Daylight Time (UTC-4), matching Puerto Rico. From November to March, Miami is on Eastern Standard Time (UTC-5), one hour behind Puerto Rico.
Source: IANA tzdb2026d · Reviewed
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