Time zone · Antarctic
ROTHER
Rothera Time
Rothera Time is used in the remote Antarctic research station of Rothera, the British Antarctic Survey's main logistics hub. It operates on a fixed UTC−03:00 offset year-round, with no daylight saving adjustments, making it consistent and predictable for researchers working in one of Earth's harshest environments.
Sunday, May 31, 2026
Current offset
UTC-03:00
Standard · -03
Daylight saving
Not observed
Year-round standard time
IANA zones
1
None observe daylight saving
DST offset
—
No summer variant
About ROTHER
A fixed, year-round offset.
Rothera Time is used in the remote Antarctic research station of Rothera, the British Antarctic Survey's main logistics hub. It operates on a fixed UTC−03:00 offset year-round, with no daylight saving adjustments, making it consistent and predictable for researchers working in one of Earth's harshest environments.
IANA zones · the technical identifiers
The zone that resolve to ROTHER.
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.
Where ROTHER is used
One country.
Same offset · UTC-03:00
Other zones at UTC-03:00 right now.
These named zones share ROTHER's offset today. When daylight saving rules differ, they drift apart for part of the year.
Frequently asked questions
Common questions about ROTHER, daylight saving, and how to handle it in software. Can't find what you need? Email [email protected].
- Why doesn't Rothera observe daylight saving time?
- At such extreme southern latitudes, seasonal daylight variation is already dramatic—from near-constant sun in summer to near-constant darkness in winter. DST would provide no practical benefit to station operations.
- When was the current UTC−03 offset established?
- Rothera adopted the current UTC−03:00 offset in 2021, replacing the previous UTC−04:00 schedule to better align with supply flights from South America.
- Which country uses Rothera Time?
- Antarctica's Rothera Research Station uses this timezone, operated by the British Antarctic Survey. No other civilian population uses it.
- Is there DST in Antarctica?
- Most Antarctic stations do not observe DST since the continent has no permanent civilian population. Research stations follow the timezone of their parent country or choose their own offsets for practical scheduling.
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