Time zone · Asia
ETT
East Timor Time
East Timor Time (ETT) is the time zone of Timor-Leste, 9 hours ahead of Coordinated Universal Time (UTC+09:00). It keeps the same time as Japan and Korea. Since adopting this offset in 2000, it has remained stable all year with no seasonal clock changes.
Thursday, October 15, 2026
Current offset
UTC+09:00
Standard · +09
Daylight saving
Not observed
Year-round standard time
IANA zones
1
None observe daylight saving
DST offset
—
No summer variant
About ETT
A fixed, year-round offset.
East Timor Time (ETT) is the time zone of Timor-Leste, 9 hours ahead of Coordinated Universal Time (UTC+09:00). It keeps the same time as Japan and Korea. Since adopting this offset in 2000, it has remained stable all year with no seasonal clock changes.
IANA zones · the technical identifiers
The zone that resolve to ETT.
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 across ETT
Local time, city by city.
1 city
Where ETT is used
One country.
Same offset · UTC+09:00
Other zones at UTC+09:00 right now.
These named zones share ETT's offset today. When daylight saving rules differ, they drift apart for part of the year.
Convert
ETT to the world's clocks.
Frequently asked questions
Common questions about ETT, daylight saving, and how to handle it in software. Can't find what you need? Email [email protected].
- How does East Timor Time compare with neighboring Indonesia?
- Timor-Leste is on UTC+09:00, one hour ahead of Central Indonesia Time (UTC+08:00, used in Bali and Indonesian West Timor) and two hours ahead of Western Indonesia Time (UTC+07:00, used in Jakarta). It keeps the same time as Eastern Indonesia Time (UTC+09:00), used in Maluku and Papua.
- Does East Timor observe daylight saving time?
- No. Timor-Leste has never observed daylight saving time. The clocks stay on UTC+09:00 year-round, so there are no spring‑forward or fall‑back changes.
- When did East Timor adopt UTC+09:00?
- Timor-Leste adopted UTC+09:00 in 2000 as part of establishing a stable national time standard. Since then, its offset has not changed, making it easy to calculate time differences.
- Is East Timor Time used outside Timor-Leste?
- No. East Timor Time is used only in Timor-Leste, where the whole country, including the capital Dili, keeps one clock.
- What is a practical side effect of no daylight saving for teams?
- Because the offset never changes, East Timor’s +09:00 difference from UTC is a constant. The gap to places that observe daylight saving, such as Europe or North America, still shifts by an hour when they change their clocks.
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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