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Timezone abbreviation
IRKT currently resolves here through Asia/Irkutsk, where the live offset is +08:00 (GMT+8). This page expands that into the broader meaning set, top cities, countries, similar labels, and safer exact-zone equivalents.
Last updated recently. Representative zones, offset ranges, and city usage are refreshed from the current timezone dataset so abbreviation pages stay tied to real zones instead of static boilerplate.
IRKT, or Irkutsk Time, is the civil time of southeastern Siberia, covering Irkutsk Oblast and the Republic of Buryatia around Lake Baikal, fixed at UTC+08:00 and five hours ahead of Moscow (MSK+5). It is one of Russia's eleven national time zones, anchored by the city of Irkutsk on the Angara River. The zone has a turbulent recent history: in March 2011, under President Dmitry Medvedev, Russia abolished seasonal changes and locked Irkutsk onto permanent summer time at UTC+09:00; in 2014, under a law signed by President Vladimir Putin, the country reverted to permanent standard time and Irkutsk was reset to UTC+08:00 year-round, where it has remained without DST. The Russian Federal Agency on Technical Regulation and Metrology (Rosstandart) administers the standard, distinguishing IRKT from the broader UTC+8 cluster as a continental Siberian zone rather than a coastal Asian one.
Sources
Last verified 2026-05-23 (research).
IRKT is a European civil-time label, currently 8h ahead of UTC at +08:00. It maps to 1 IANA zone across 1 country, and the cities below show how the label actually spreads across the continent.
The busiest cities using IRKT in the current catalog are Irkutsk, Ulan-Ude, Bratsk, Angarsk, and Ust’-Ilimsk. The lead live reference on this page is Irkutsk (Asia/Irkutsk), currently at +08:00 (GMT+8). Those cities are what give IRKT its actual feel rather than the abstract offset.
IRKT is stable on Asia/Irkutsk year-round, with no seasonal clock changes in the next year. That makes it a low-friction choice for recurring meetings and broadcast schedules — but software still prefers the IANA zone because governments can change civil-time rules independently of the short code.
Live reference
Asia/Irkutsk
Current offset
+08:00 (GMT+8)
Meanings / zones / countries
1 / 1 / 1
Offset range
UTC+08:00
IRKT sits in the East Asian and Australian band where mornings start while Europe is still working overnight. In practice it is read inside Middle East and West Asia, where the leading city anchors are Irkutsk, Russia, Ulan-Ude, Russia, and Bratsk, Russia.
IRKT is unusually unambiguous: it ties to a single country and a single IANA zone, which is closer to a national clock label than a multi-region abbreviation.
IRKT shows up on energy-market schedules, regional aviation, and Gulf-area broadcast guides. IRKT stays on a single offset year-round in the current data, which simplifies its operational use.
Zone family, representative city, current offset, country coverage, and nearby abbreviation context for IRKT.
Primary zone
Asia/Irkutsk
Live offset
+08:00 · GMT+8
Region family
Middle East and West Asia
Meaning count
1 meaning
Zone / country reach
1 zones · 1 countries
Representative city
Irkutsk, Russia
Country anchor
Russia
DST posture
No upcoming seasonal clock change detected in the representative zone
Offset range
UTC+08:00
Data fingerprint
This compact fingerprint is intentionally specific: exact zone IDs, place anchors, country anchors, transition cues, and offset peers. It gives humans and crawlers concrete reasons not to collapse IRKTinto another abbreviation with the same clock hour.
Route identity
irkt · IRKT · Irkutsk Time · Asia/Irkutsk
Exact IANA zone set
Asia/Irkutsk
Place anchors
Irkutsk, Russia, Ulan-Ude, Russia, and Bratsk, Russia
Country anchors
Russia (Asia/Irkutsk)
Transition fingerprints
Asia/Irkutsk: no next-year switch
Offset peers to verify
AWST (Australia/Perth), CST (Asia/Shanghai), GMT+8 (Asia/Taipei), HKT (Asia/Hong_Kong), MYT (Asia/Kuala_Lumpur), PHT (Asia/Manila), SGT (Asia/Singapore), ULAT (Asia/Ulaanbaatar), WITA (Asia/Makassar)
Abbreviation dossier
These checks separate the abbreviation from lookalike labels and same-offset codes: the representative IANA zone, the current civil-time reading, the city/country footprint, and whether the lead zone has an upcoming clock change.
Primary live reading
Irkutsk Time resolves through Asia/Irkutsk right now: +08:00 (GMT+8).
Ambiguity status
IRKT maps to one meaning in this catalog, but the IANA zone still matters because clock-change rules live on the zone, not the short code.
DST and transition posture
Asia/Irkutsk has no scheduled offset switch in the next year in this snapshot.
Country and city reach
IRKT is represented across 1 country, 1 IANA zone, and lead cities including Irkutsk, Russia, Ulan-Ude, Russia, and Bratsk, Russia.
Same-offset caution
IRKT and AWST currently share +08:00, but they point at different civil-time labels, cities, countries, and source contexts. Treat the matching offset as arithmetic only, not semantic equivalence.
Editorial check
Irkutsk and Lake Baikal reading: Use Asia/Irkutsk when the source points to Irkutsk, Buryatia, Lake Baikal, Bratsk, or other eastern Siberia context.
Precision layer
Timezone abbreviations are useful display labels, but they are weak storage keys. This register shows the exact risks for IRKT: ambiguity, seasonal changes, same-offset neighbors, and the safer value to store in software, calendars, or operations notes.
Abbreviation ambiguity risk
MediumIRKT has one meaning in this catalog, but the zone and country context still carry the legal-time rule.
Seasonal clock-change risk
LowAsia/Irkutsk is stable for the next-year transition scan, so the main risk is policy change or same-offset confusion.
Same-offset confusion risk
High9 other abbreviation pages currently share +08:00; the same clock hour is not the same civil-time context.
Storage recommendation
Use exact zoneStore Asia/Irkutsk or a UTC instant. Display IRKT only as a human-facing label after the exact zone is known.
Coverage breadth
1 zonesIRKT covers 1 IANA zone and 1 country grouping in this page's retained dataset.
Four fixed UTC checkpoints expose whether IRKT crosses a local date boundary in Asia/Irkutsk. This is the practical difference between a harmless clock conversion and a deadline, release, travel, or reporting mistake.
IRKT keeps this checkpoint on the same calendar date as UTC in Asia/Irkutsk.
IRKT keeps this checkpoint on the same calendar date as UTC in Asia/Irkutsk.
IRKT moves this checkpoint to the next local date in Asia/Irkutsk, which matters for reports, releases, travel, and deadline wording.
IRKT moves this checkpoint to the next local date in Asia/Irkutsk, which matters for reports, releases, travel, and deadline wording.
These abbreviation pages currently share +08:00with IRKT. They can show the same wall-clock hour while pointing at different countries, holidays, market calendars, languages, airports, and legal-time rules.
Australian Western Time
AWST shares the current UTC offset with IRKT, but it is anchored to Australia/Perth and Australia and Antarctica. Treat the shared offset as arithmetic only, not as the same holidays, cities, market calendars, or policy context.
China Time
CST shares the current UTC offset with IRKT, but it is anchored to Asia/Shanghai and China, Mexico, and United States. Treat the shared offset as arithmetic only, not as the same holidays, cities, market calendars, or policy context.
Brunei Time
GMT+8 shares the current UTC offset with IRKT, but it is anchored to Asia/Taipei and Taiwan and Brunei. Treat the shared offset as arithmetic only, not as the same holidays, cities, market calendars, or policy context.
Hong Kong Time
HKT shares the current UTC offset with IRKT, but it is anchored to Asia/Hong_Kong and Hong Kong. Treat the shared offset as arithmetic only, not as the same holidays, cities, market calendars, or policy context.
Malaysia Time
MYT shares the current UTC offset with IRKT, but it is anchored to Asia/Kuala_Lumpur and Malaysia. Treat the shared offset as arithmetic only, not as the same holidays, cities, market calendars, or policy context.
Philippine Time
PHT shares the current UTC offset with IRKT, but it is anchored to Asia/Manila and Philippines. Treat the shared offset as arithmetic only, not as the same holidays, cities, market calendars, or policy context.
Singapore Time
SGT shares the current UTC offset with IRKT, but it is anchored to Asia/Singapore and Singapore. Treat the shared offset as arithmetic only, not as the same holidays, cities, market calendars, or policy context.
Ulaanbaatar Time
ULAT shares the current UTC offset with IRKT, but it is anchored to Asia/Ulaanbaatar and Mongolia. Treat the shared offset as arithmetic only, not as the same holidays, cities, market calendars, or policy context.
Central Indonesia Time
WITA shares the current UTC offset with IRKT, but it is anchored to Asia/Makassar and Indonesia. Treat the shared offset as arithmetic only, not as the same holidays, cities, market calendars, or policy context.
The hardest abbreviation mistakes happen when two labels share a similar offset. This matrix spells out what changes when the neighboring label is actually a different civil clock, city cluster, or source context.
IRKT and AWST currently share +08:00, but they point at different civil-time labels, cities, countries, and source contexts. Treat the matching offset as arithmetic only, not semantic equivalence.
IRKT and CST currently share +08:00, but they point at different civil-time labels, cities, countries, and source contexts. Treat the matching offset as arithmetic only, not semantic equivalence.
IRKT and GMT+8 currently share +08:00, but they point at different civil-time labels, cities, countries, and source contexts. Treat the matching offset as arithmetic only, not semantic equivalence.
IRKT and HKT currently share +08:00, but they point at different civil-time labels, cities, countries, and source contexts. Treat the matching offset as arithmetic only, not semantic equivalence.
IRKT and ICT sit near each other in the catalog, but the live offset and representative-zone context differ. Use the exact IANA zone before storing or sharing the time.
IRKT and MYT currently share +08:00, but they point at different civil-time labels, cities, countries, and source contexts. Treat the matching offset as arithmetic only, not semantic equivalence.
Editorial disambiguation
IRKT is Irkutsk Time, a Russian UTC+8 civil-time label anchored to Asia/Irkutsk rather than a generic East Asia business clock. Its useful context is Irkutsk, Ulan-Ude, Bratsk, Angarsk, the Lake Baikal region, Siberian rail and aviation schedules, energy and mining operations, and Russia-facing government or logistics planning. It can share the same arithmetic offset as PHT, HKT, SGT, MYT, or parts of China, but the country calendar, language, legal clock, workweek assumptions, and long-distance travel context are Russian and Siberian. Russia also does not currently use daylight saving in this zone, so the main risk is not a seasonal switch; it is mistaking a Russian regional clock for a Philippine, Hong Kong, Singapore, Malaysia, or China-facing schedule.
Russia sits in Europe, specifically Eastern Europe. Population 146,028,325, area 17,098,246 km², capital Moscow. Civic markers behind IRKT include Russian and RUB (Russian ruble, ₽).
Russia is linked as the country-level reference source for IRKT; the civic context above is drawn from structured country fields rather than copied reference prose.
IRKT in the Irkutsk Time meaning runs 8h ahead of UTC through Middle East and West Asia, threading zones such as Asia/Irkutsk (cities: Irkutsk, Ulan-Ude, and Bratsk). Country anchors: Russia.
Irkutsk Time
Current reading: GMT+8 at +08:00 in Russia.
Asia/Irkutsk does not show a scheduled offset change in the next year, so the current offset can be treated as operationally stable for short-term planning.
City anchors include Irkutsk, Ulan-Ude, and Bratsk, while country anchors include Russia.
Live reference zone: Asia/Irkutsk (GMT+8, +08:00)
Leading city in the current dataset: Irkutsk, Russia.
Cities: Irkutsk, Russia, Ulan-Ude, Russia, and Bratsk, Russia. Countries: Russia.
Live zones: Asia/Irkutsk (+08:00).
Countries
Russia
Top cities
Irkutsk, Ulan-Ude, Bratsk, Angarsk
Russia runs on a single zone (24 mapped cities) under IRKT. Visible cities: Irkutsk, Ulan-Ude, and Bratsk. Underlying zones: Asia/Irkutsk.
City anchors for IRKT (Middle East and West Asia, currently +08:00). Pick a city to drop into a live local clock.
Russia
Cities: Irkutsk, Ulan-Ude, Bratsk, Angarsk
Meaning group: Irkutsk Time
IRKT is not heavily split in the current catalog, but the short label still hides the underlying IANA zone and any future policy change. The safe pattern is to write the abbreviation for humans and the zone for machines.
Asia/Irkutsk does not show an offset change in the next year, which makes IRKT predictable for short-term scheduling. Predictable is not the same as permanent — civil-time rules still get changed by governments on relatively short notice.
For precise work, the safest equivalent of IRKT is the exact IANA zone used by your city or system. Asia/Irkutsk sits at +08:00, ahead of UTC, which means daily logs in this zone reach a new calendar date before UTC does — a small detail that breaks date-based reporting if missed.
Within this single zone (Asia/Irkutsk, +08:00), IRKT is unambiguous, so the abbreviation and the IANA zone effectively interchange.
The next best click after an abbreviation page usually depends on whether you need a city, a converter, or a live clock.
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