Gustavia, Saint Barthelemy · UTC-4 ☆

Gustavia is in the Atlantic Standard Time timezone (AST/UTC-4), year-round with no daylight saving.

Gustavia is the capital of Saint Barthélemy, a French island collectivity in the northeastern Caribbean. It runs on Atlantic Standard Time, UTC-4, year-round. No daylight saving.

The island is tiny: 25 square kilometers, about 10,000 residents. The harbor at Gustavia fills with superyachts in winter, when wealthy visitors from North America and Europe escape the cold. The New Year period and February are the peak season.

Swedish history and French luxury

Saint Barthélemy was Swedish from 1784 to 1878, when France purchased it back. The Swedish legacy is visible in Gustavia’s name and its street layout, and in the duty-free status the island maintained, originally negotiated by Sweden.

The French luxury culture arrived after reunification with France and has deepened since. Designer boutiques and high-end restaurants line the harbor streets. The “Saint Barths time” is officially UTC-4, but the social rhythm of the luxury tourism economy runs on visitor clocks, which vary constantly.

Caribbean latitude and consistent daylight

Saint Barthélemy sits at 17.9 degrees North latitude. Day length variation is minimal: about 2.5 hours between solstices. Sunrise is never dramatically early or late. The UTC-4 fixed offset is practical and stable.

Convert 9am Gustavia time to other cities.

Sources

• IANA Time Zone Database
• Collectivité de Saint-Barthélemy
• Dookhan, Isaac. A History of the Virgin Islands of the United States. Caribbean Universities Press, 1974.