Carolina, Puerto Rico · UTC-4
Convert time from Carolina
Carolina is one of Puerto Rico’s most populous municipalities, located east of San Juan and home to Luis Muñoz Marín International Airport, the island’s main aviation hub. It runs on America/Puerto_Rico: UTC-4, Atlantic Standard Time, year-round. Puerto Rico does not observe daylight saving time.
Puerto Rico is a US territory, and most of the US mainland observes DST. This creates a seasonal timezone shift between Puerto Rico and the mainland: in winter, Puerto Rico is one hour ahead of the US Eastern Seaboard. In summer, when the Eastern US springs forward, Puerto Rico and the Eastern US are on the same clock (both UTC-4). The alignment shifts with the seasons.
The airport city
Carolina’s primary identity in the broader Puerto Rico system is as the airport municipality. Most visitors to Puerto Rico first arrive in Carolina. The airport’s schedule, running on Atlantic Standard Time, connects to flights from New York (UTC-5 winter, UTC-4 summer), Miami, and international destinations. The time difference with the US Eastern Seaboard is one hour in winter, zero in summer.
San Juan is directly west of Carolina and shares the same timezone. The two cities form a continuous urban area along Puerto Rico’s northern coast.
At 18 degrees north
Carolina sits at 18 degrees north, in the tropics. Daylight varies modestly: sunrise between 5:45am and 6:30am, sunset between 6pm and 7pm through the year. The fixed UTC-4 clock aligns reasonably with this cycle. There is no dramatic summer evening light and no winter darkness to motivate DST.
The time conversion from Carolina to London puts London four hours ahead in winter, five in summer when the UK observes BST.
Sources
Read more about time in Puerto Rico →Same time as Carolina
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Questions about time in Carolina
- What timezone is Carolina in?
- Carolina uses the IANA timezone
America/Puerto_Rico. The UTC offset is always UTC-4 — this timezone does not observe daylight saving time. - Does Carolina observe daylight saving time?
- No. Carolina does not observe daylight saving time. The UTC offset remains UTC-4 all year round.
- What is the current UTC offset for Carolina?
- Carolina is currently at UTC-4.
- What is the time difference between Carolina and London?
- Carolina is currently 5 hours behind London.
- What is the time difference between Carolina and Los Angeles?
- Carolina is currently 3 hours ahead of Los Angeles.
- What is the time difference between Carolina and Tokyo?
- Carolina is currently 13 hours behind Tokyo.
- What is the IANA timezone name for Carolina?
- The IANA timezone database identifier for Carolina is
America/Puerto_Rico. Use this string in programming languages and APIs: JavaScript (`new Intl.DateTimeFormat('en-US', { timeZone: 'America/Puerto_Rico' })`), Python (`pytz.timezone('America/Puerto_Rico')`), or any IANA-compatible library.