Irkutsk Time (IRKT)

Irkutsk Time (IRKT) operates at UTC+8 year-round and is used in Irkutsk Oblast and the Republic of Buryatia in southeastern Siberia, Russia. Sometimes simply referred to as "Irkutsk Standard Time," IRKT does not observe daylight saving time and provides a stable reference for government, transport, and regional industry.

Importance and Global Use of IRKT

Irkutsk Time (IRKT) is essential for coordinating public services, education, commerce, and transportation across Irkutsk Oblast and Buryatia, which are major hubs along the Trans-Siberian Railway. A consistent UTC+8 offset supports reliable scheduling for local industries, tourism, and community life in this important part of Siberia.

Internationally, IRKT aligns these regions with neighboring countries and regions in East Asia operating on the same time offset, such as China and parts of Mongolia. This supports trade, logistics, and cross-border cooperation, strengthening Irkutsk's role as a gateway between Russia and the Asia-Pacific region.

Where and When IRKT is used worldwide

Asia

Areas and locations in Russia using IRKT all year:

• Buryatia Republic
• Irkutsk Oblast

Other Time Zones in UTC +8

Other time zones share the same offset as Irkutsk Time (IRKT), but are known by different names. While their clocks align, they may represent different regions or countries based on local time zone definitions.

• Australian Western Standard Time – AWST
• Brunei Darussalam Time – BNT
• Casey Time – CAST
• Choibalsan Time – CHOT
• China Standard Time – CST
• Hong Kong Time – HKT
• Malaysia Time – MYT
• Philippine Standard Time – PHST
• Singapore Time – SGT
• Ulaanbaatar Time – ULAT
• Central Indonesian Time – WITA