Americas · Caribbean · Dependency
Current time in Puerto Rico
A single time zone at UTC-04:00.
Friday, June 5, 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) as its standard time since the early 20th century. When the U.S. acquired Puerto Rico in 1898, the island gradually aligned its timekeeping with mainland U.S. practices while maintaining its position in the Atlantic time zone. Unlike most U.S. states, Puerto Rico does not observe daylight saving time, so its time matches the U.S. East Coast during winter and Florida/Georgia during daylight saving months.
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 and the Eastern Seaboard, but from November to March it aligns with Miami and Florida. This makes it a popular destination for travelers wanting to avoid time changes, and means no clock adjustments for Puerto Ricans when the mainland shifts twice yearly.
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 aligns with Florida and other non-DST southern states, giving a consistent single time offset.
- 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?
- Yes, Puerto Rico and Florida share the same UTC-4 time during U.S. standard time months, but during U.S. daylight saving time, Miami shifts ahead to UTC-4, matching Puerto Rico's consistent AST.
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