No overlap — one side will join outside working hours
MST (Denver)
MSK (Moscow)
00:00
09:00Working
01:00
10:00Working
02:00
11:00Working
03:00
12:00Working
04:00
13:00Working
05:00
14:00Working
06:00
15:00Working
07:00
16:00Working
08:00
17:00
09:00Working
18:00off
10:00Working
19:00off
11:00Working
20:00off
12:00Working
21:00off
13:00Working
22:00off
14:00Working
23:00off
15:00Working
00:00+1doff
16:00Working
01:00+1doff
17:00
02:00+1d
18:00
03:00+1d
19:00
04:00+1d
20:00
05:00+1d
21:00
06:00+1d
22:00
07:00+1d
23:00
08:00+1d
Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between mst and msk?
Mountain Standard Time (mst) is UTC-6 and Moscow Standard Time (msk) is UTC+3. The difference between them is 9 hours.
Where is mst used?
Mountain Standard Time (mst) is used in USA and surrounding regions. The IANA timezone identifier is America/Denver.
Where is msk used?
Moscow Standard Time (msk) is used in Russia and surrounding regions. The IANA timezone identifier is Europe/Moscow.
How do I convert mst to msk?
Use the interactive converter above. Drag the time slider to any mst time and the msk equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
MST (Denver) is 9 hours behind MSK (Moscow). When it's noon in MST (Denver), it's 21:00 in MSK (Moscow).
MST (Denver) runs on America/Denver; MSK (Moscow) runs on Europe/Moscow. Together they are 9 hours apart.
Mutual working hours
There is no business hours overlap between MST (Denver) and MSK (Moscow) during standard working hours (9:00–17:00). Meetings would require one party to work outside normal hours.
Best call times between these locations
MST (Denver) and MSK (Moscow) have no shared working window. These slots minimize out-of-hours disruption for both sides.
07:00 Denver / 16:00 Moscow⚡ One side off-hours
⚠️ 2h before working hours in Denver
09:00 Denver / 18:00 Moscow⚡ One side off-hours
⚠️ 2h after working hours in Moscow
06:00 Denver / 15:00 Moscow⚡ 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.
MST (Denver)8 holidays
Jun 19Juneteenth National Independence DaySOON
Jul 3Independence Day
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
MSK (Moscow)2 holidays
Jun 12Russia DaySOON
Nov 4Unity Day
MST (Denver) and MSK (Moscow) — practical scheduling
MST (Denver) (USA) and MSK (Moscow) (Russia) 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 07:00 meeting in MST (Denver) means 16:00 in MSK (Moscow) (2h before working hours in Denver).
⚡
A 09:00 meeting in MST (Denver) means 18:00 in MSK (Moscow) (2h after working hours in Moscow).
⚡
A 06:00 meeting in MST (Denver) means 15:00 in MSK (Moscow) (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 MST (Denver)".
