Technical Specifications & Standards
Official chronometric properties, ISO standards, and international database registry identifiers for Irkutsk Time:
Daylight Saving Time (DST) Transitions
⬆️ Spring Forward (Clocks Advance)
None
⬇️ Fall Back (Clocks Return)
None
Observing Jurisdictions & Subdivisions
1 Sovereign NationsSovereign nations, administrative subdivisions, and regional territories officially operating under IRKT:
Regional Subdivisions & Territory Details
Financial Markets & Trading Hours
Handles Lake Baikal eco-tourism, timber exports, and mineral extraction contracts operating on the same clock as Beijing.
Local Hours: 10:00 - 18:00 IRKT
UTC Window: 02:00 - 10:00 UTC
Major Cities in IRKT
Primary metropolitan centers and financial hubs observing this time zone:
Adoption History & Astronomical Facts
Year Established: 1920
Classified as MSK+5, Irkutsk Time covers southeastern Siberia and the Lake Baikal watershed, operating five hours ahead of Moscow and sharing UTC+8 with China.
Lake Baikal, the deepest and oldest freshwater lake in the world containing 20% of Earth's unfrozen surface freshwater, is situated entirely within Irkutsk Time.
Frequently Asked Questions about IRKT
What is Irkutsk Time?
Irkutsk Time (IRKT) is UTC+8 (MSK+5), observed around Lake Baikal and Buryatia.
What is the time difference between Moscow and Irkutsk?
Irkutsk is 5 hours ahead of Moscow.
Is Irkutsk in the same time zone as Beijing?
Yes. Both Irkutsk and Beijing operate on UTC+8.