IANA tz database · zone identifier

America/Whitehorse

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

UTC-07:00Abbreviation MSTNo DST — never observed
Time in America/Whitehorse☀ Daylight
16:00:11
Wednesday, July 15, 2026
Offset
UTC-07:00
Abbreviation
MST
DST
No DST

Current offset

UTC-07:00

same year-round

Abbreviation

MST

used year-round

DST behaviour

Never

has never observed daylight saving

Country

🇨🇦 Canada

ISO 3166: CA · view country page →

Using this identifier

The string to put in your code.

America/Whitehorse 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 MST or -07:00 — abbreviations are ambiguous and fixed offsets can't follow rule changes.

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

Offset & DST behaviour

One offset,
5 years.

America/Whitehorse has kept UTC-07:00 year-round since 1 November 2020 — 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

−09:00:12UTC-07:00 · UNCHANGED 1 November 2020 NOW

Keeping this offset since

1 November 2020

Next transition

None scheduled

no DST rules exist for this zone

Safe to assume

Local = UTC − 7h, always

…but store the identifier anyway

Technical record

The database entry, in full.

source: IANA tz database

IdentifierAmerica/Whitehorse
ISO country codeCA🇨🇦 Canada
Reference coordinates60.72°N, 135.05°Wtz database reference point
Standard offsetUTC-07:00abbreviation MST
Daylight offset—daylight saving has never been observed

Where it applies

One of Canada's 23 zones.

🇨🇦
Canada

37M people, 23 time zones — this identifier covers one of them.

Country page →

Related identifiers

Nearby in the database.

Same zone group · Yukon Time

other identifiers keeping MST

Same offset · UTC-07:00

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 America/Whitehorse?
America/Whitehorse is UTC-07:00, year-round. The offset never changes because the zone does not observe daylight saving time.
Does America/Whitehorse observe daylight saving time?
No. America/Whitehorse has never observed DST — it has kept UTC-07:00 continuously since 1 November 2020.
Which country uses America/Whitehorse?
Canada. It is one of 23 IANA zones covering the country.
Is America/Whitehorse the same as MST?
America/Whitehorse is one of the IANA zones that keeps Yukon Time (MST). Use America/Whitehorse in software — MST 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=America/Whitehorse
{
"iana": "America/Whitehorse",
"utc_offset": "-07:00",
"abbreviation": "MST",
"observes_dst": false,
"country": "CA"
}