UK to Puerto Rico Time Converter
About this conversion
Puerto Rico uses Atlantic Standard Time (UTC-4) all year and does not observe daylight saving. It is four hours behind the UK in winter and five hours behind in summer.
Puerto Rico is a US territory but, unlike most of the US, it does not change its clocks. It matches New York while the US is on daylight saving time, and is one hour ahead of New York in winter.
When the time difference changes
Changes over the next two years, from daylight saving on either side.
- Sunday, 25 October 2026: Puerto Rico becomes 4 hours behind UK.
- Sunday, 28 March 2027: Puerto Rico becomes 5 hours behind UK.
- Sunday, 31 October 2027: Puerto Rico becomes 4 hours behind UK.
- Sunday, 26 March 2028: Puerto Rico becomes 5 hours behind UK.
Best time to call or meet
14:00 to 17:00 UK is 09:00 to 12:00 Puerto Rico, 3 hours of shared 09:00 to 17:00 time.
Common times
- 06:00 UK = 01:00 Puerto Rico
- 09:00 UK = 04:00 Puerto Rico
- 12:00 UK = 07:00 Puerto Rico
- 15:00 UK = 10:00 Puerto Rico
- 17:00 UK = 12:00 Puerto Rico
- 20:00 UK = 15:00 Puerto Rico
UK to Puerto Rico hour-by-hour table
Highlighted rows fall within 09:00 to 17:00 on both sides.
| UK | Puerto Rico |
|---|---|
| 00:00 | 19:00 (previous day) |
| 01:00 | 20:00 (previous day) |
| 02:00 | 21:00 (previous day) |
| 03:00 | 22:00 (previous day) |
| 04:00 | 23:00 (previous day) |
| 05:00 | 00:00 |
| 06:00 | 01:00 |
| 07:00 | 02:00 |
| 08:00 | 03:00 |
| 09:00 | 04:00 |
| 10:00 | 05:00 |
| 11:00 | 06:00 |
| 12:00 | 07:00 |
| 13:00 | 08:00 |
| 14:00 | 09:00 |
| 15:00 | 10:00 |
| 16:00 | 11:00 |
| 17:00 | 12:00 |
| 18:00 | 13:00 |
| 19:00 | 14:00 |
| 20:00 | 15:00 |
| 21:00 | 16:00 |
| 22:00 | 17:00 |
| 23:00 | 18:00 |
Related conversions
Clock change guides
- What Is Daylight Saving Time (DST)? A Plain-English GuideWhat daylight saving time is, how it works in the UK, Europe and the US, why it exists, its history, who uses it and the argument over scrapping it.
- Why Do the Clocks Go Back in October? The Real ReasonThe clocks go back in autumn to return the UK to GMT, so winter mornings are lighter. The history, the rule, what time it happens and what changes for you.
- When Do the Clocks Go Forward Again After Going Back?When the UK clocks go forward again after the autumn change, how long the UK stays on GMT, when evenings get lighter and how to remember to reset your clocks.
Frequently asked questions
What is 15:00 UK in Puerto Rico?
15:00 UK is 10:00 Puerto Rico at the moment. The answer can change by an hour when either side changes its clocks.
What are the shared working hours for UK and Puerto Rico?
Counting 09:00 to 17:00 as the working day on both sides, there are 3 shared hours, starting at 14:00 UK.
When does the UK to Puerto Rico time difference change?
It next changes on Sunday, 25 October 2026, when the gap becomes 4 hours behind.
What is the time difference between the UK and Puerto Rico?
Four hours in UK winter and five hours in UK summer, with Puerto Rico behind.
Does Puerto Rico change its clocks?
No. It stays on Atlantic Standard Time all year.