French Guiana Time (GFT)

French Guiana Time (GFT) operates at UTC−3 year-round and does not observe daylight saving time. It is the standard time zone used across French Guiana, an overseas department of France located on the northeastern coast of South America. Sometimes referred to simply as "Guiana Time," GFT provides a consistent time reference for this French-administered territory.

Importance and Global Use of GFT

French Guiana Time (GFT) is essential for coordinating government administration, public services, and economic activities in French Guiana. It supports critical sectors including education, health services, and transportation across the territory. The time zone also synchronizes operations at the Guiana Space Centre in Kourou, one of the world's leading satellite launch facilities, which relies on precise timekeeping.

Globally, while GFT has limited civilian or commercial impact outside French Guiana, it is significant for international partnerships in space exploration, environmental conservation, and trade. Its consistent UTC−3 standard helps align international collaborations involving European and South American partners working through French Guiana's strategic geographic location.

Where and When GFT is used worldwide

South America

South American countries using GFT all year:

• French Guiana

Other Time Zones in UTC -3

Other time zones share the same offset as French Guiana Time (GFT), but are known by different names. While their clocks align, they may represent different regions or countries based on local time zone definitions.

• Atlantic Daylight Time – ADT
• Argentina Time – ART
• Brasília Time – BRT
• Chile Summer Time – CLST
• Falkland Islands Summer Time – FKST
• Pierre & Miquelon Standard Time – PMST
• Paraguay Summer Time – PYST
• Paraguay Time – PYT
• Suriname Time – SRT
• Uruguay Time – UYT