Time zone · Antarctic
ROTHER
Rothera Time
Rothera Time (ROTHER) is a single-zone region anchored by the Rothera Research Station in Antarctica, where the clocks stay fixed at UTC-03:00 year-round with no daylight saving changes. Living or collaborating here means dealing with a stable, predictable offset in one of the most remote and extreme environments on Earth.
Wednesday, October 14, 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 (ROTHER) is a single-zone region anchored by the Rothera Research Station in Antarctica, where the clocks stay fixed at UTC-03:00 year-round with no daylight saving changes. Living or collaborating here means dealing with a stable, predictable offset in one of the most remote and extreme environments on Earth.
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.
Convert
ROTHER to the world's clocks.
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 Time observe daylight saving?
- Rothera has kept a fixed UTC-03:00 since December 1976 and never adopted daylight saving, which keeps flight, supply and science schedules simple. Not all Antarctic stations do the same: McMurdo, for example, follows New Zealand's daylight saving.
- How does the lack of DST affect daily life at Rothera?
- Without daylight saving transitions, schedules for flights, supply deliveries, and scientific operations remain constant, reducing confusion and helping teams coordinate more reliably across continents.
- How do researchers handle the extreme daylight cycles in Antarctica with a fixed offset?
- Researchers adapt to continuous daylight or darkness by relying on strict work schedules and artificial lighting, while the fixed time offset simplifies communication with home countries.
- Is Rothera Time used outside the research station?
- Rothera Time is primarily used within the Rothera Research Station and its immediate operations; other Antarctic bases may follow different offsets based on their home countries.
Source: IANA tzdb2026d · Reviewed
Free · Developer API
This time zone, as JSON.
Its defining offset, DST status and member counts, from one endpoint.
Also in the API: time zones by coordinates, conversions that flag daylight saving gaps, and abbreviations decoded.
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