No overlap — one side will join outside working hours
MSK (Moscow)
MST (Denver)
00:00
15:00-1dWorking
01:00
16:00-1dWorking
02:00
17:00-1d
03:00
18:00-1d
04:00
19:00-1d
05:00
20:00-1d
06:00
21:00-1d
07:00
22:00-1d
08:00
23:00-1d
09:00Working
00:00off
10:00Working
01:00off
11:00Working
02:00off
12:00Working
03:00off
13:00Working
04:00off
14:00Working
05:00off
15:00Working
06:00off
16:00Working
07:00off
17:00
08:00
18:00
09:00Working
19:00
10:00Working
20:00
11:00Working
21:00
12:00Working
22:00
13:00Working
23:00
14:00Working
Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between msk and mst?
Moscow Standard Time (msk) is UTC+3 and Mountain Standard Time (mst) is UTC-6. The difference between them is 9 hours.
Where is msk used?
Moscow Standard Time (msk) is used in Russia and surrounding regions. The IANA timezone identifier is Europe/Moscow.
Where is mst used?
Mountain Standard Time (mst) is used in USA and surrounding regions. The IANA timezone identifier is America/Denver.
How do I convert msk to mst?
Use the interactive converter above. Drag the time slider to any msk time and the mst equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
MSK (Moscow) is 9 hours ahead of MST (Denver). When it's noon in MSK (Moscow), it's 03:00 in MST (Denver).
MSK (Moscow) runs on Europe/Moscow; MST (Denver) runs on America/Denver. Together they are 9 hours apart.
Mutual working hours
There is no business hours overlap between MSK (Moscow) and MST (Denver) during standard working hours (9:00–17:00). Meetings would require one party to work outside normal hours.
Best call times between these locations
MSK (Moscow) and MST (Denver) have no shared working window. These slots minimize out-of-hours disruption for both sides.
16:00 Moscow / 07:00 Denver⚡ One side off-hours
⚠️ 2h before working hours in Denver
18:00 Moscow / 09:00 Denver⚡ One side off-hours
⚠️ 2h after working hours in Moscow
15:00 Moscow / 06:00 Denver⚡ One side off-hours
⚠️ 3h before working hours in Denver
Working hours defined as 09:00–17:00 local time for each location.
Public holidays this year
⚡ Upcoming holidays in both locations, confirm with your contact before booking.
MSK (Moscow)1 holiday
Nov 4Unity Day
MST (Denver)8 holidays
Jun 19Juneteenth National Independence DaySOON
Jul 3Independence Day
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
MSK (Moscow) and MST (Denver) — practical scheduling
MSK (Moscow) (Russia) and MST (Denver) (USA) are 9 hours apart — far enough that standard 9–5 schedules do not overlap. Any real-time meeting means someone is joining outside their normal hours.
💡 Practical scheduling guidelines
⚡
A 16:00 meeting in MSK (Moscow) means 07:00 in MST (Denver) (2h before working hours in Denver).
⚡
A 18:00 meeting in MSK (Moscow) means 09:00 in MST (Denver) (2h after working hours in Moscow).
⚡
A 15:00 meeting in MSK (Moscow) means 06:00 in MST (Denver) (3h before working hours in Denver).
With no shared business hours, these slots distribute the scheduling burden as evenly as possible between both locations.
Avoid scheduling mistakes — especially around daylight saving changes. Use the ClockinSync Chrome Extension to instantly verify and compare both time zones directly in your browser, without manual calculations.
Need a specific time? Use the slider or type directly into the input bar — it understands "3pm", "15:30", and location-specific formats like "9am MSK (Moscow)".
