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In Puerto Rico, there is only one time zone in use: Atlantic Standard Time, AST (UTC-04). Time in Puerto Rico does not change because it does not observe Daylight Saving Time.
For comparing the current time in Puerto Rico and United Kingdom or any other country combination, visit time comparison. For an introduction to UTC and world time, read UTC by country. Time changes in Puerto Rico are shown below by city, state or region.
| Regions | Standard Time | Daylight Saving Time | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Time zone | 2016 | 2017 | 2018 | Time zone | 2016 | 2017 | 2018 | |||
| Atlantic Standard Time AST (UTC-04) | UTC-04 all year long | No Daylight Saving Time | |||||||
The information in this page comes from data published in the Time Zone Database managed by the Internet Assigned Numbers Authority (IANA).
| Year | Time zone Abbreviation | UTC Offset | Time zone Name | Daylight Saving Time | Begins (local time) |
|---|---|---|---|---|---|
| 1945 | AST | UTC-04 | Atlantic Standard Time | no | Sunday, September 30 1945, 02:00 AM |
| 1945 | APT | UTC-03 | yes | Tuesday, August 14 1945, 08:00 PM | |
| 1942 | AWT | UTC-03 | yes | Sunday, May 3 1942, 12:00 AM | |
| 1901 | AST | UTC-04 | Atlantic Standard Time | no | Friday, December 13 1901, 04:45 PM |