IANA tz database · zone identifier

Asia/Dili

The IANA tz database identifier for East Timor Time in Timor-Leste. Store this string — not the abbreviation, not the offset — and your timestamps stay correct forever.

UTC+09:00Abbreviation +09No DST — never observed
Time in Asia/Dili☀ Daylight
07:58:19
Thursday, July 16, 2026
Offset
UTC+09:00
Abbreviation
+09
DST
No DST

Current offset

UTC+09:00

same year-round

Abbreviation

+09

tzdb uses numeric abbreviations here

DST behaviour

Never

has never observed daylight saving

Country

🇹🇱 Timor-Leste

ISO 3166: TL · view country page →

Using this identifier

The string to put in your code.

Asia/Dili is the identifier to use in code and config for this region. Every modern language, database, and OS resolves it through the same tz database, so the examples here behave identically everywhere.

Avoid storing +09 or +09:00 — abbreviations are ambiguous and fixed offsets can't follow rule changes.

// format a date in this zone
new Intl.DateTimeFormat('en-US', {
timeZone: 'Asia/Dili',
dateStyle: 'full', timeStyle: 'long'
}).format(new Date());

Offset & DST behaviour

One offset,
25 years.

Asia/Dili has kept UTC+09:00 year-round since 17 September 2000 — no daylight saving and no offset changes on record since. It is among the most stable identifiers in the database.

Every offset this zone has kept

+08:22:20UTC+09:00 · UNCHANGED 17 September 2000 NOW

Keeping this offset since

17 September 2000

Next transition

None scheduled

no DST rules exist for this zone

Safe to assume

Local = UTC + 9h, always

…but store the identifier anyway

Technical record

The database entry, in full.

source: IANA tz database

IdentifierAsia/Dili
ISO country codeTL🇹🇱 Timor-Leste
Reference coordinates8.55°S, 125.58°Etz database reference point
Standard offsetUTC+09:00abbreviation +09
Daylight offset—daylight saving has never been observed

Where it applies

All of Timor-Leste, one clock.

Looking for travel-friendly info? See Dili or East Timor Time.

🇹🇱
Timor-Leste

1.2M people, one time zone. The whole country resolves to Asia/Dili.

Country page →
🇹🇱 Dili
07:58
07:58:19 · +09
pop. 222KETT

Related identifiers

Nearby in the database.

Same offset · UTC+09:00

other zones keeping this offset right now

Frequently asked questions

Answers specific to this identifier — generated from the database record. Can't find what you need? Email [email protected].

What UTC offset is Asia/Dili?
Asia/Dili is UTC+09:00, year-round. The offset never changes because the zone does not observe daylight saving time.
Does Asia/Dili observe daylight saving time?
No. Asia/Dili has never observed DST — it has kept UTC+09:00 continuously since 17 September 2000.
Which country uses Asia/Dili?
Timor-Leste. The identifier covers the whole country.
Is Asia/Dili the same as ETT?
Asia/Dili is one of the IANA zones that keeps East Timor Time (ETT). Use Asia/Dili in software — ETT is a human-friendly label, not a valid identifier.

Free · Developer API

This zone, as JSON.

Everything on this page — offset, abbreviation, DST rules, coordinates — from one endpoint, always current with the latest tzdb release.

GET /v1/timezones Live

countries, cities, convert, DST transitions coming next.

Get your free API key →
// this identifier, resolved live
GET /v1/timezones?iana=Asia/Dili
{
"iana": "Asia/Dili",
"utc_offset": "+09:00",
"abbreviation": "+09",
"observes_dst": false,
"country": "TL"
}