IANA tz database · zone identifier

Indian/Reunion

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

UTC+04:00Abbreviation +04No daylight saving
Time in Indian/Reunion☾ Night
03:00:00
Thursday, October 15, 2026
Offset
UTC+04:00
Abbreviation
+04
DST
No DST

Current offset

UTC+04:00

same year-round

Abbreviation

+04

tzdb uses numeric abbreviations here

DST behaviour

None

one offset all year

Country

🇷🇪 Réunion

ISO 3166: RE · view country page →

Using this identifier

The string to put in your code.

Indian/Reunion 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 +04 or +04:00 — abbreviations are ambiguous and fixed offsets can't follow rule changes.

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

Offset & DST behaviour

One offset,
115 years.

Indian/Reunion has kept UTC+04:00 year-round since 31 May 1911 — 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

+03:41:52UTC+04:00 · UNCHANGED 31 May 1911 NOW

Keeping this offset since

31 May 1911

Next transition

None scheduled

no DST rules exist for this zone

Safe to assume

Local = UTC + 4h, always

…but store the identifier anyway

Technical record

The database entry, in full.

source: IANA tz database · release 2026d

IdentifierIndian/Reunion
ISO country codeRE🇷🇪 Réunion
Reference coordinates20.87°S, 55.47°Etz database reference point
Standard offsetUTC+04:00abbreviation +04
Daylight offset—no daylight saving time
tzdb release2026ddata current as of this IANA release

Where it applies

All of Réunion, one clock.

Looking for travel-friendly info? See Saint-Denis or Réunion Time.

🇷🇪
Réunion

890K people, one time zone. The whole country resolves to Indian/Reunion.

Country page →
🇷🇪 Saint-Denis
03:00
03:00:00 · +04
pop. 156KREUNIO

Related identifiers

Nearby in the database.

Same offset · UTC+04:00

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 Indian/Reunion?
Indian/Reunion is UTC+04:00, year-round. The offset never changes because the zone does not observe daylight saving time.
Does Indian/Reunion observe daylight saving time?
No. Indian/Reunion stays on UTC+04:00 all year, as it has since 31 May 1911.
Which country uses Indian/Reunion?
Réunion. The identifier covers the whole country.
Is Indian/Reunion the same as REUNIO?
Indian/Reunion is one of the IANA zones that keeps Réunion Time (REUNIO). Use Indian/Reunion in software — REUNIO is a human-friendly label, not a valid identifier.

Free · Developer API

This zone, as JSON.

Its live offset, abbreviation and DST status, plus its coordinates and country, from one endpoint.

GET /v1/timezones Live

Also in the API: time zones by coordinates, conversions that flag daylight saving gaps, and abbreviations decoded.

Get your free API key → All endpoints Plans and pricing

Moving off WorldTimeAPI? Our drop-in replacement needs no key.

// this identifier, resolved live
GET /v1/timezones/Indian/Reunion
{
"data": {
"iana": "Indian/Reunion",
"observes_dst": false,
"country": { "code": "RE", "name": "Réunion" },
"current": {
"utc_offset": "+04:00",
"abbreviation": "+04",
…
},
…
}
}