Time zone · Antarctic
FSAT
French Southern & Antarctic Time
French Southern & Antarctic Time (FSAT) is a remote, UTC+05:00 zone used in the French Southern and Antarctic Lands, including the Kerguelen Islands. With no daylight saving changes, it offers a stable, predictable rhythm for researchers and support staff living and working in one of Earth’s most isolated outposts.
Sunday, May 31, 2026
Current offset
UTC+05:00
Standard · +05
Daylight saving
Not observed
Year-round standard time
IANA zones
1
None observe daylight saving
DST offset
—
No summer variant
About FSAT
A fixed, year-round offset.
French Southern & Antarctic Time (FSAT) is a remote, UTC+05:00 zone used in the French Southern and Antarctic Lands, including the Kerguelen Islands. With no daylight saving changes, it offers a stable, predictable rhythm for researchers and support staff living and working in one of Earth’s most isolated outposts.
IANA zones · the technical identifiers
The zone that resolve to FSAT.
For software, always store the IANA identifier — never the abbreviation alone. The database keeps these zones distinct because their rules can, and historically did, diverge.
Cities currently on FSAT
The same hour, city by city.
1 city · all UTC+05:00
Where FSAT is used
One country.
Same offset · UTC+05:00
Other zones at UTC+05:00 right now.
These named zones share FSAT's offset today. When daylight saving rules differ, they drift apart for part of the year.
Frequently asked questions
Common questions about FSAT, daylight saving, and how to handle it in software. Can't find what you need? Email [email protected].
- What is French Southern & Antarctic Time (FSAT)?
- FSAT is a UTC+05:00 time zone used in the French Southern and Antarctic Lands, such as the Kerguelen Islands, providing a consistent offset year-round with no daylight saving adjustments.
- Which areas use FSAT?
- FSAT is used in the French Southern and Antarctic Lands, including the Kerguelen Islands, which host scientific research stations and limited support personnel.
- Does FSAT observe daylight saving time?
- No, FSAT does not observe daylight saving time, so the UTC+05:00 offset remains the same throughout the year.
- Why doesn’t FSAT change for daylight saving?
- The French Southern and Antarctic Lands are located in a region where seasonal daylight variation does not justify clock changes, and a fixed offset simplifies logistics for research and supply operations.
- What is the representative zone for FSAT?
- The representative zone is Kerguelen (Indian/Kerguelen), which follows UTC+05:00 and does not observe daylight saving time.
- How does FSAT compare to other French territories?
- Unlike metropolitan France, which uses Central European Time and observes daylight saving, FSAT stays on a fixed UTC+05:00, reflecting the unique geographic and operational needs of the southern territories.
- Is FSAT used in Antarctica?
- FSAT is associated with the French Southern and Antarctic Lands, but actual Antarctic research stations may use different timekeeping practices depending on their national programs and logistical needs.
- What is life like in the FSAT zone?
- Life in the FSAT zone is centered around scientific research and environmental monitoring, with a small, rotating community of scientists and support staff adapting to extreme isolation and harsh weather.
- Are there any upcoming time changes in FSAT?
- No, there are no scheduled daylight saving transitions or offset changes in FSAT, so the current UTC+05:00 offset is expected to remain in effect indefinitely.
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