IANA tz database · zone identifier

Europe/Oslo

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

UTC+02:00Abbreviation CESTObserves daylight saving
Time in Europe/Oslo☾ Night
00:58:41
Thursday, July 16, 2026
Offset
UTC+02:00
Abbreviation
CEST
DST
Active

Current offset

UTC+02:00

standard UTC+01:00 · daylight UTC+02:00

Abbreviation

CEST

the daylight-saving form

DST behaviour

Observes

changes clocks twice a year

Country

🇳🇴 Norway

ISO 3166: NO · view country page →

Using this identifier

The string to put in your code.

Europe/Oslo 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 CEST or +02:00 — abbreviations are ambiguous and fixed offsets can't follow rule changes.

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

Offset & DST behaviour

Two offsets,
every year.

Europe/Oslo alternates between CET (UTC+01:00) and CEST (UTC+02:00). Right now it is on CEST; clocks fall back on 25 October 2026.

The year at a glance

CET · UTC+01:00CEST · UTC+02:00CET · UTC+01:0029 Mar · +1h25 Oct · −1h Jan 2026 Dec

Technical record

The database entry, in full.

source: IANA tz database

IdentifierEurope/Oslo
ISO country codeNO🇳🇴 Norway
Reference coordinates59.92°N, 10.75°Etz database reference point
Standard offsetUTC+01:00abbreviation CET
Daylight offsetUTC+02:00abbreviation CEST

Where it applies

All of Norway, one clock.

Looking for travel-friendly info? See Oslo or Central European Standard Time.

🇳🇴
Norway

5.6M people, one time zone. The whole country resolves to Europe/Oslo.

Country page →
🇳🇴 Oslo
00:58
00:58:41 · CEST
pop. 718KCET

Related identifiers

Nearby in the database.

Same zone group · Central European Standard Time

other identifiers keeping CET

Same offset · UTC+02:00

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 Europe/Oslo?
Europe/Oslo is currently UTC+02:00 (CEST). It alternates between UTC+01:00 in winter and UTC+02:00 in summer.
Does Europe/Oslo observe daylight saving time?
Yes. Clocks fall back at the next transition on 25 October 2026, as they do twice every year.
Which country uses Europe/Oslo?
Norway. The identifier covers the whole country.
Is Europe/Oslo the same as CET?
Europe/Oslo is one of the IANA zones that keeps Central European Standard Time (CET). Use Europe/Oslo in software — CET 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=Europe/Oslo
{
"iana": "Europe/Oslo",
"utc_offset": "+02:00",
"abbreviation": "CEST",
"observes_dst": true,
"country": "NO"
}