The Saint-Barthélemy time difference is −4 hours from London and +1 hour from New York in winter, and −5 hours and 0 hours in summer (UK and US daylight saving seasons; Saint-Barthélemy does not change its clocks).
In practice, when it is noon in London, it is 08:00 in Gustavia during UK winter time (GMT) and 07:00 during British Summer Time. When it is noon in New York, it is 13:00 in Gustavia during Eastern Standard Time and 12:00 during Eastern Daylight Time.
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Live local time
Calculated by your browser from the IANA time zone database.
Time in Saint-Barthélemy: key facts
- Time zone: UTC−4, IANA identifier
America/St_Barthelemy - Difference with London: −4 h in UK winter (GMT), −5 h during British Summer Time
- Difference with New York: +1 h during Eastern Standard Time, 0 h during Eastern Daylight Time
- Daylight saving in Saint-Barthélemy: no, local time stays the same all year
- Next clock changes: UK on Sunday 25 October 2026 (BST to GMT) and Sunday 28 March 2027; US on Sunday 1 November 2026 (EDT to EST) and Sunday 14 March 2027
Time difference between London, New York and Saint-Barthélemy
| Time in London | In Gustavia (UK winter, GMT) | In Gustavia (UK summer, BST) |
|---|---|---|
| 08:00 | 04:00 | 03:00 |
| 12:00 | 08:00 | 07:00 |
| 18:00 | 14:00 | 13:00 |
| 22:00 | 18:00 | 17:00 |
| Time in New York | In Gustavia (US winter, EST) | In Gustavia (US summer, EDT) |
|---|---|---|
| 08:00 (8 am) | 09:00 | 08:00 |
| 12:00 (noon) | 13:00 | 12:00 |
| 18:00 (6 pm) | 19:00 | 18:00 |
| 22:00 (10 pm) | 23:00 | 22:00 |
The difference of one hour between winter and summer comes from daylight saving time in the UK and the US; local time in Saint-Barthélemy does not change.
Clock changes 2026–2027
Saint-Barthélemy does not observe daylight saving time: local time stays at UTC−4 all year round. Only clock changes in your home country alter the gap.
Clocks change on the following dates (local time):
- UK, Sunday 25 October 2026: BST (UTC+1) to GMT (UTC+0)
- US, Sunday 1 November 2026: EDT (UTC−4) to EST (UTC−5) in New York
- US, Sunday 14 March 2027: EST (UTC−5) to EDT (UTC−4)
- UK, Sunday 28 March 2027: GMT (UTC+0) to BST (UTC+1)
- UK, Sunday 31 October 2027: BST (UTC+1) to GMT (UTC+0)
- US, Sunday 7 November 2027: EDT (UTC−4) to EST (UTC−5)
When to call Saint-Barthélemy from the UK or the US
To reach someone between 09:00 and 20:00 Gustavia time, call between 13:00 and 00:00 London time in UK winter, and between 14:00 and 01:00 (running past midnight) during British Summer Time. From New York, call between 08:00 and 19:00 during EST, and between 09:00 and 20:00 during EDT.
On 15 January 2027, office hours (09:00–17:00) overlap for 4 hours with London and for 7 hours with New York. Always state the time zone in your meeting invitations.
Time difference and jet lag: practical tips
Flying to Saint-Barthélemy from the UK means travelling west: your day is lengthened and you will need to stay up later than usual. From New York the gap is at most 1 hour. A few simple rules help you adjust to local time:
- Set your watch and phone to local time as soon as you board.
- Align meals and bedtime with local time from the first day.
- Plan a light first day, with no important meetings or long drives.
- Get out in daylight when you arrive and avoid long naps.
- If you take medication at fixed times, ask your doctor how to adapt the schedule to the time difference.
Saint-Barthélemy time zone: IANA identifier and history
| Zone | IANA identifier | Standard time on 15 January 2027 | On 15 July 2027 | Abbreviation |
|---|---|---|---|---|
| Gustavia | America/St_Barthelemy | UTC−4 | UTC−4 | AST |
- Gustavia (
America/St_Barthelemy): no clock change recorded since 1 January 1970.
No daylight saving time in Saint-Barthélemy in 2027
The tz database lists no clock change in 2027 for America/St_Barthelemy: standard time remains UTC−4 all year. Only the UK clock changes (Sunday 28 March and Sunday 31 October 2027) and the US clock changes (Sunday 14 March and Sunday 7 November 2027) alter the gap.
| 2027 period | Gustavia vs London | Gustavia vs New York |
|---|---|---|
| 1 January – 13 March | −4 h | +1 h |
| 14 – 27 March | −4 h | 0 h |
| 28 March – 30 October | −5 h | 0 h |
| 31 October – 6 November | −4 h | 0 h |
| 7 November – 31 December | −4 h | +1 h |
Sunrise and sunset in Gustavia in 2027
Local sunrise and sunset times on the 15th of each month in Gustavia (17.90° N, 62.85° W). They help you time your exposure to daylight, the main lever for resetting your body clock on arrival.
| 15th of the month | Sunrise | Solar noon | Sunset | Day length | Sunrise / sunset in London time |
|---|---|---|---|---|---|
| January | 06:46 | 12:21 | 17:56 | 11 h 10 | 10:46 / 21:56 |
| February | 06:38 | 12:26 | 18:13 | 11 h 34 | 10:38 / 22:13 |
| March | 06:19 | 12:20 | 18:21 | 12 h 02 | 10:19 / 22:21 |
| April | 05:55 | 12:11 | 18:28 | 12 h 33 | 10:55 / 23:28 |
| May | 05:39 | 12:08 | 18:37 | 12 h 58 | 10:39 / 23:37 |
| June | 05:36 | 12:12 | 18:48 | 13 h 12 | 10:36 / 23:48 |
| July | 05:44 | 12:17 | 18:50 | 13 h 06 | 10:44 / 23:50 |
| August | 05:54 | 12:16 | 18:38 | 12 h 44 | 10:54 / 23:38 |
| September | 05:59 | 12:07 | 18:14 | 12 h 15 | 10:59 / 23:14 |
| October | 06:05 | 11:57 | 17:50 | 11 h 45 | 11:05 / 22:50 |
| November | 06:17 | 11:56 | 17:35 | 11 h 18 | 10:17 / 21:35 |
| December | 06:35 | 12:06 | 17:38 | 11 h 04 | 10:35 / 21:38 |
The longest day in the table is 15 June (13 h 12 between 05:36 and 18:48), the shortest 15 December (11 h 04).
Jet lag: how flight direction affects you in Saint-Barthélemy
- Outbound from the UK (flying west): you « gain » 4 hours in UK winter and 5 hours in summer; your arrival day is lengthened and tiredness hits early in the local evening.
- Return to the UK (flying east): the opposite applies. Flying east shortens the day: plan a quiet day when you get home.
- Your usual night at home (23:00 – 07:00) corresponds to 19:00 – 03:00 in Gustavia from London in UK winter (18:00 – 02:00 during BST), and to 00:00 – 08:00 in Gustavia from New York during EST (23:00 – 07:00 during EDT): this is when your body will want to sleep for the first few days.
- Daylight on arrival: in Gustavia, the sun rises around 06:46 and sets around 17:56 in mid-January, and around 05:44 and 18:50 in mid-July (table above). After flying west, make the most of late-afternoon light to stay awake until the evening; this is the standard advice for shifting your body clock.
Plan your trip to Saint-Barthélemy
- Our complete Saint-Barthélemy travel guide: highlights, itineraries and budget
- Best time to visit Saint-Barthélemy: month-by-month weather and the best season
- Time differences around the world: every country in our guides
Frequently asked questions
What is the time difference between Saint-Barthélemy and the UK or the US?
Saint-Barthélemy is 4 hours behind London in UK winter and 5 hours behind during British Summer Time. It is 1 hour ahead of New York during Eastern Standard Time and at the same time during Eastern Daylight Time.
What time is it in Saint-Barthélemy when it is noon in London or New York?
In Gustavia, noon in London is 08:00 in UK winter and 07:00 in summer; noon in New York is 13:00 during EST and 12:00 during EDT.
Does Saint-Barthélemy have daylight saving time?
No, local time stays at UTC−4 all year. Only clock changes in the UK or the US alter the gap.
When should I call Saint-Barthélemy from the UK or the US?
To reach someone between 09:00 and 20:00 local time, call between 13:00 and 00:00 London time in UK winter (14:00 to 01:00 during BST), or between 08:00 and 19:00 New York time during EST (09:00 to 20:00 during EDT).
What is the IANA time zone for Saint-Barthélemy?
Gustavia: America/St_Barthelemy.
What time does the sun rise in Gustavia?
Around 06:46 on 15 January 2027 and around 05:44 on 15 July 2027 (local time); sunset around 17:56 and 18:50. Destination de Voyage calculation (NOAA algorithm).
Our sources
- Sunrise and sunset: algorithm from the NOAA Solar Calculator (Global Monitoring Laboratory), applied to the capital’s coordinates (Natural Earth, Wikidata or Wikipedia): Destination de Voyage calculation.
- IANA Time Zone Database (tz database), version 2026b, consulted on 13 October 2026: time zones, rules and clock-change dates. Future dates may be changed by local authorities.
- UK clock changes: GOV.UK, When do the clocks change? (UK summer time from the last Sunday in March to the last Sunday in October).
- US daylight saving time: NIST, Daylight Saving Time (from the second Sunday in March to the first Sunday in November).
- Live time: calculated by your browser (Intl API), which relies on the same IANA database.
- Our methodology
Updated November 2026.