No overlap — one side will join outside working hours
EET (Athens)
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 eet and mst?
Eastern European Time (eet) is UTC+3 and Mountain Standard Time (mst) is UTC-6. The difference between them is 9 hours.
Where is eet used?
Eastern European Time (eet) is used in Greece and surrounding regions. The IANA timezone identifier is Europe/Athens.
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 eet to mst?
Use the interactive converter above. Drag the time slider to any eet time and the mst equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
EET (Athens) to MST (Denver) — exact time difference
EET (Athens) is 9 hours ahead of MST (Denver). Midday in EET (Athens) lines up with 03:00 in MST (Denver).
EET (Athens) runs on Europe/Athens; MST (Denver) runs on America/Denver. Together they are 9 hours apart.
Working hours overlap
There is no business hours overlap between EET (Athens) and MST (Denver) during standard working hours (9:00–17:00). Meetings would require one party to work outside normal hours.
Best times to schedule a meeting
EET (Athens) and MST (Denver) have no shared working window. These slots minimize out-of-hours disruption for both sides.
16:00 Athens / 07:00 Denver⚡ One side off-hours
⚠️ 2h before working hours in Denver
18:00 Athens / 09:00 Denver⚡ One side off-hours
⚠️ 2h after working hours in Athens
15:00 Athens / 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.
Upcoming public holidays
⚡ Watch out — upcoming holidays on both sides. Verify availability in advance.
EET (Athens)4 holidays
Aug 15Assumption Day
Oct 28Ochi Day
Dec 25Christmas Day
Dec 26St. Stephen's Day
MST (Denver)7 holidays
Jul 3Independence DaySOON
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
Nov 11Veterans Day
How to work with EET (Athens) and MST (Denver) time zones
Working across EET (Athens) (Greece) and MST (Denver) (USA) is a challenge — the 9-hour difference means no shared business hours window under a standard schedule. Flexibility from at least one side is required.
💡 How to schedule across these time zones
⚡
A 16:00 meeting in EET (Athens) means 07:00 in MST (Denver) (2h before working hours in Denver).
⚡
A 18:00 meeting in EET (Athens) means 09:00 in MST (Denver) (2h after working hours in Athens).
⚡
A 15:00 meeting in EET (Athens) means 06:00 in MST (Denver) (3h before working hours in Denver).
Since there is no natural overlap, the options above represent the most balanced compromise, minimizing out-of-hours inconvenience for both sides.
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 EET (Athens)".
