Irkutsk

Asia • Irkutsk

Russia

Current local time

12:14:26

Sunday, May 31, 2026

UTC offset

UTC+08:00

No daylight saving changes

Irkutsk does not observe daylight saving time. Clocks stay on UTC+08:00 all year long.

Timezone details

Identifier
Abbreviation
—
Transitioned
May 31, 2021 at 09:00 AM

Location

Latitude
52.26666
Longitude
104.33333
Country
Russia

Irkutsk Standard Time (IST)

FAQs

Irkutsk Standard Time (IST) stays locked at UTC+08:00 all year round, with no shifts for daylight saving—making it a reliable anchor for life and collaboration across eastern Siberia.

  • Is there any part of Russia that observes daylight saving?

    Most of Russia has moved away from seasonal clock shifts since 2011. Once, the whole country toggled between winter and summer time, but now regions like Irkutsk stay fixed year-round.

  • Why is the abbreviation IST ambiguous?

    IST can stand for multiple time zones: India Standard Time, Israel Standard Time, or Irish Standard Time. On timezone.io we use IST only for Irkutsk Standard Time—so double-check your traveler’s destination.

  • What areas use IST?

    Currently IST covers two Russian federal subjects: Irkutsk Oblast and the Republic of Buryatia, both hugging the southern edge of Siberia along Lake Baikal.

  • What challenges come with a fixed UTC+08 offset in Siberia?

    Daylight swings are dramatic in these high-latitude regions. In Irkutsk, winter brings short, dark days while summers offer long, bright evenings—planning around natural light matters more than clock changes.

  • How many global regions share the same +08:00 offset?

    Several—like China, Singapore, Western Australia, and Central Indonesia. Despite sharing a numeric offset, their local calendars, business hours, and holiday rhythms differ widely.

  • Does IST affect travel into or out of Russia?

    Traveling west or east across Russia’s ten other time zones means constant mental math. Planning layovers or connections through Novosibirsk, Moscow, or Vladivostok requires careful offset checks.

  • Are there plans to change IST’s offset?

    Russia’s 2 reform in 2011 scrapped daylight saving nationwide and locked most regions to fixed offsets. Since then, some regions have shifted UTC values but UTC+08 in Irkutsk has stayed put.

  • What cultural aspects bind IST together?

    Both Irkutsk Oblast and the Republic of Buryatia blend Russian and indigenous Buryat cultures. The region’s vibrant festivals—like Sagaalgan (Buryat New Year) and City Day in Irkutsk—follow local tradition more than clock rules.