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America/Puerto_Rico

America/Puerto_Rico is the IANA time zone for Puerto Rico.

UTC−04:00

Tue, Sep 29 UTC−4 AST

Offsets and daylight saving time

Standard offset
UTC−04:00
Rule
No daylight saving time: UTC−4 all year.

No clock changes are scheduled in the next three years.

Names

Generic name
Atlantic Standard Time
Abbreviation
AST
Long name
Atlantic Standard Time
Aliases
America/Virgin (old ids that resolve to America/Puerto_Rico)

Use it in code

// JavaScript
new Intl.DateTimeFormat('en-US', { timeZone: 'America/Puerto_Rico' })

# Python
from zoneinfo import ZoneInfo
ZoneInfo('America/Puerto_Rico')

-- PostgreSQL
SELECT now() AT TIME ZONE 'America/Puerto_Rico';

Cities in America/Puerto_Rico

Also in this zone: Bayamón, Carolina, Ponce, Arecibo, Caguas, Guaynabo, Trujillo Alto, Mayagüez, Fajardo, Vega Baja, Cataño, Barceloneta, Guayama, Humacao, Yauco, Cayey, Manatí.

Offset history since 1970

  • 1970–2026: UTC−4

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