Time Difference from San Juan to Major World Cities
Visual offset comparison between San Juan and key financial and international communication centers:
Drag the timeline scrubber to compare local hours across both locations:
America/Puerto_Rico Timezone Specifications & DST Rules
About the AST Abbreviation
AST stands for America/Puerto_Rico. It is observed across central and western Africa at UTC -04:00. Note: During seasonal Daylight Saving Time periods, the abbreviation shifts to ADT (UTC -03:00).
Travel, Infrastructure & Business Essentials for San Juan
Essential practical information for international business travelers, digital nomads, and expats visiting San Juan:
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Related Cities in the Same Region & Timezone
Major commercial and administrative hubs in neighboring territories sharing direct regional links with San Juan:
Frequently Asked Questions about San Juan Time
What is the current local time and timezone in San Juan?
San Juan operates on America/Puerto_Rico (abbreviated as AST). The standard offset is UTC -04:00.
What does AST timezone stand for?
AST stands for America/Puerto_Rico. It is 1 hour ahead of Greenwich Mean Time (GMT+1 / UTC+1).
Does San Juan change clocks for Daylight Saving Time (DST)?
Yes, San Juan observes Daylight Saving Time. Clocks move forward 1 hour in summer to ADT (UTC -03:00) and return to standard time in winter.
What power plug and voltage adapter do I need for San Juan?
Puerto Rico uses plug types A and B with a standard voltage of 120V at 60Hz.
How can I convert time or schedule calls with San Juan?
You can use the interactive 24-hour dual-slider converter directly on this page, or visit our Time Difference Tool and Meeting Planner to schedule seamless cross-timezone calls.