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San Juan is -5h behind London
Quick converter
FROM
London
United Kingdom
UTC+01:00
TO
San Juan
Puerto Rico
UTC-04:00
Date-aware conversion
Result
Sat, Jun 20, 2026 21:26
London: Sunday, June 21, 2026 2:26 AM GMT+1 to San Juan: Saturday, June 20, 2026 9:26 PM AST.
San Juan is 5h behind London on this date
Every hour in London and the corresponding time in San Juan. Green rows indicate business hours in San Juan.
Time zones
London uses Europe/London (GMT+1) and San Juan uses America/Puerto_Rico (AST). The difference can shift during daylight saving changes, so checking the exact date matters.
Best use
Use the green rows to spot normal working hours in San Juan. For teams across more cities, open the meeting planner and compare up to five locations.
Plan a meetingMeeting guidance
The easiest overlap starts around 2:00 PM and runs through 5:00 PM in the source city, while the destination city is also inside normal working hours. For important calls, check the meeting date because the offset can change when either location enters or leaves daylight saving time.
Compare meeting hoursQuick examples
City context
London is located in United Kingdom (Europe). It uses the Europe/London timezone with a standard offset of UTC+01:00. It observes DST, switching between GMT and BST. See the full London time page for live clock and planning details.
San Juan is located in Puerto Rico (North America). It uses the America/Puerto_Rico timezone with a standard offset of UTC-04:00. It does not observe Daylight Saving Time. See the full San Juan time page for live clock and planning details.
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Current city times