JST to MSK
Tokyo to Moscow.
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All date & timeQuestions
What time is MSK when it is 12:00 JST?
06:00. Moscow Time is 6 hours behind Japan Standard Time, all year round. A 9-to-5 day in Tokyo overlaps a 9-to-5 day in Moscow for 2 hours, between 15:00 and 17:00 JST.
Is the difference between JST and MSK the same all year?
Yes. Moscow Time is 6 hours behind Japan Standard Time, all year round. Neither zone shifts in a way that changes the gap, so a time you work out once stays correct.
What do JST and MSK actually stand for?
JST is Japan Standard Time, the zone covering Tokyo, currently UTC+9 in January. MSK is Moscow Time, covering Moscow, at UTC+3. Fixed at UTC+9 with no daylight saving — Japan tried it briefly after the war and abandoned it. Korea runs on the same offset, so Tokyo and Seoul clocks always match.
Anything worth knowing about Moscow Time?
Russia abolished daylight saving in 2014, so Moscow is a fixed UTC+3 all year. Its distance from Europe therefore changes twice a year — two hours from Paris in winter, one in summer — even though Moscow itself never moves.
When is a good time to call between Tokyo and Moscow?
A 9-to-5 day in Tokyo overlaps a 9-to-5 day in Moscow for 2 hours, between 15:00 and 17:00 JST. If the call has to happen outside that, the fairer arrangement is usually to alternate which side takes the awkward hour rather than always asking the same one.
How it works, and more about jst → msk
The difference, and whether you can rely on it
In January, Moscow Time is 6 hours behind Japan Standard Time — UTC+9 against UTC+3. It stays that way all year, so the number is worth memorising if you work across these two often.
When you can both be at a desk
A standard working day in Tokyo overlaps one in Moscow between 15:00 and 17:00 JST — 2 hours. Anything outside that asks somebody to start early or finish late.
Reading the abbreviations literally will mislead you
JST strictly means one fixed offset, but almost nobody uses it that way. People write it to mean the time in Tokyo, which shifts if the city observes daylight saving, which this one does not. This page follows the common usage rather than the strict one, because the strict reading gives an answer that is wrong for a good part of the year.
Fixed at UTC+9 with no daylight saving — Japan tried it briefly after the war and abandoned it. Korea runs on the same offset, so Tokyo and Seoul clocks always match. Russia abolished daylight saving in 2014, so Moscow is a fixed UTC+3 all year. Its distance from Europe therefore changes twice a year — two hours from Paris in winter, one in summer — even though Moscow itself never moves.
Scheduling something recurring
For a one-off, the converter above is the whole job. For a standing meeting across zones it is worth putting the invitation in a calendar that stores the zone rather than the time — then the changeover is handled for you and nobody has to remember. If you are trying to find a slot across more than two places at once, the meeting planner shows a whole day at a glance instead.