What timezone is Irkutsk in?

Irkutsk uses the IANA timezone Asia/Irkutsk. The UTC offset is always UTC+8 — this timezone does not observe daylight saving time.

Does Irkutsk observe daylight saving time?

No. Irkutsk does not observe daylight saving time. The UTC offset remains UTC+8 all year round.

What is the time difference between Irkutsk and New York?

Irkutsk is currently 12 hours ahead of New York.

What is the time difference between Irkutsk and London?

Irkutsk is currently 7 hours ahead of London.

Irkutsk, Russia · UTC+8

00:07:14

Friday, April 3, 2026

W14 ↑ 06:37 ↓ 19:37 No DST

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Irkutsk is a major city in eastern Siberia, on the Angara River near Lake Baikal. It runs on Irkutsk Time, UTC+8, year-round. Russia abolished daylight saving nationally in 2014, and Irkutsk has kept a fixed clock since.

At UTC+8, Irkutsk is 5 hours ahead of Moscow and shares its offset with Beijing, Shanghai, and Singapore. When it is noon in Irkutsk, it is 7am in Moscow and 4am in London.

The Trans-Siberian Railway and railroad time

The Trans-Siberian Railway, completed across its full extent by 1916, solved a massive timezone coordination problem. The entire Russian imperial rail network used Moscow time for scheduling, regardless of local solar time. A train departing Irkutsk would list its departure in Moscow time even though that time was completely different from what any local clock showed.

This practice continues today. Russian long-distance train schedules are printed in Moscow time. Passengers boarding in Irkutsk must add 5 hours to find the local time. It is one of the world’s most persistent examples of operational time diverging from civil time.

Lake Baikal and the Siberian year

Lake Baikal, 70 kilometers from Irkutsk, is the world’s deepest lake. It freezes solid from January to May, then opens again in summer. The ice season and the navigation season create a natural binary year that matters more to many residents than any administrative calendar.

Convert 9am Irkutsk time to other cities.

Sources

IANA Time Zone Database
Federal State Statistics Service Russia
Bisher, Jamie. White Terror: Cossack Warlords of the Trans-Siberian. Routledge, 2005.

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Questions about time in Irkutsk

What timezone is Irkutsk in?: Irkutsk uses the IANA timezone Asia/Irkutsk. The UTC offset is always UTC+8 — this timezone does not observe daylight saving time.
Does Irkutsk observe daylight saving time?: No. Irkutsk does not observe daylight saving time. The UTC offset remains UTC+8 all year round.
What is the current UTC offset for Irkutsk?: Irkutsk is currently at UTC+8.
What is the time difference between Irkutsk and New York?: Irkutsk is currently 12 hours ahead of New York.
What is the time difference between Irkutsk and London?: Irkutsk is currently 7 hours ahead of London.
What is the time difference between Irkutsk and Los Angeles?: Irkutsk is currently 15 hours ahead of Los Angeles.
What is the time difference between Irkutsk and Tokyo?: Irkutsk is currently 1 hour behind Tokyo.
What is the IANA timezone name for Irkutsk?: The IANA timezone database identifier for Irkutsk is Asia/Irkutsk. Use this string in programming languages and APIs: JavaScript (`new Intl.DateTimeFormat('en-US', { timeZone: 'Asia/Irkutsk' })`), Python (`pytz.timezone('Asia/Irkutsk')`), or any IANA-compatible library.

Irkutsk, Russia · UTC+8 ☆