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San Juan, Puerto Rico

San Juan follows Atlantic Standard Time at UTC−4 all year. Puerto Rico’s capital does not observe daylight saving time, so its clocks never make a seasonal jump.

San Juan, Puerto Rico

Saturday, 5 September 2026

UTC−4 · America/Puerto_Rico

Time and sun data for San Juan — the largest city of San Juan

The sun in San Juan

Sunrise 6:12 AM Solar noon 12:25 PM Sunset 6:37 PM Daylight 12 h 25 min Night 11 h 35 min Civil twilight 5:50 AM – 6:59 PM

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Current time in San Juan, Puerto Rico

San Juan provides a convenient time reference for the whole of Puerto Rico because every municipality shares its zone. An event advertised in San Juan local time needs no conversion for someone in Bayamón, Carolina, Ponce, Mayagüez, or elsewhere on the island.

International users should focus on the UTC−4 offset and the meeting date. San Juan remains stable, but a city that observes daylight saving time can change its clock difference from Puerto Rico. This is why an annual or recurring event may appear at a different local hour abroad.

Time standard: Atlantic Standard Time International offset: UTC−4 Daylight saving time in San Juan: not observed Time-zone changes within Puerto Rico: none San Juan traffic may affect when you arrive; it does not affect which time zone receives you.

Sunrise in the capital

Sunrise in San Juan changes by date, so the useful value is today’s or the selected day’s calculation. Twilight begins before sunrise, and sunset occurs after a varying span of daylight. These events should be checked independently for precise plans.

San Juan is on the northeastern side of Puerto Rico. It generally sees sunrise earlier by the clock than places near the western end of the island on the same morning. The difference reflects longitude while the entire island continues to use the same civil time.

The published sunrise marks an astronomical event under standard assumptions. Buildings, coastal cloud, trees, and the observer’s exact position can affect when the sun becomes visible. For flights, harbor activities, photography, or exercise, combine solar information with local weather and access conditions.

San Juan and Puerto Rico’s other major centers

San Juan is Puerto Rico’s capital, most populous municipality, and principal urban center. Bayamón and Carolina are other large municipalities within the broader northern metropolitan region. Ponce is a major center on the south coast, Caguas is important inland, Mayagüez serves the west, and Guaynabo is part of the capital-area urban network.

“City” can refer to a municipality, a central community, or a larger urban area. Those boundaries differ, so population tables based on them may not produce identical rankings. This distinction matters for demographic comparisons but not for timekeeping: all Puerto Rico municipalities use AST.

Treat San Juan time as the default local time throughout Puerto Rico. State UTC−4 when an invitation crosses national or territorial boundaries. Check whether remote participants change clocks between meeting dates. Consult a current, location-specific listing for sunrise and twilight.

Questions and answers
Is San Juan in the Eastern Time Zone?
No. San Juan uses Atlantic Standard Time, although its clock may sometimes match places using Eastern Daylight Time.
Does San Juan change clocks in spring or autumn?
No. Its UTC−4 offset stays fixed throughout the year.
Do Ponce and San Juan have the same time?
Yes. They share one Puerto Rico-wide time zone despite being on different coasts.

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