What time is it in Irkutsk?

Russia spans 11 time zones, so the answer depends on where in it you mean. Irkutsk covers MSK+05 - Irkutsk, Buryatia and is 5 hours ahead Moscow, which is the zone most people mean by “the time in Russia”.

Irkutsk does not observe daylight saving, so its offset from UTC never moves. Its relationship to places that do change shifts twice a year instead.