EET to MST Time Converter
MST is 9 hours behind EET. Eastern Europe is currently on EEST (UTC+3:00), and The US Mountain states are currently on MDT (UTC-6:00).
Best Time to Call Between EET and MST
Standard 9-to-5 hours in these two zones never overlap, so someone has to take the call outside their working day. The most workable window is 4:00 PM to 10:00 PM EET, which is 7:00 AM to 1:00 PM MST.
both at work EET only MST only neither — hours along the strip are EET.
Common Times Converted
EET on the left, MST on the right.
EET to MST: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| EET | MST | Working hours |
|---|---|---|
| 12:00 AM | 3:00 PM prev day | MST only |
| 1:00 AM | 4:00 PM prev day | MST only |
| 2:00 AM | 5:00 PM prev day | — |
| 3:00 AM | 6:00 PM prev day | — |
| 4:00 AM | 7:00 PM prev day | — |
| 5:00 AM | 8:00 PM prev day | — |
| 6:00 AM | 9:00 PM prev day | — |
| 7:00 AM | 10:00 PM prev day | — |
| 8:00 AM | 11:00 PM prev day | — |
| 9:00 AM | 12:00 AM | EET only |
| 10:00 AM | 1:00 AM | EET only |
| 11:00 AM | 2:00 AM | EET only |
| 12:00 PM | 3:00 AM | EET only |
| 1:00 PM | 4:00 AM | EET only |
| 2:00 PM | 5:00 AM | EET only |
| 3:00 PM | 6:00 AM | EET only |
| 4:00 PM | 7:00 AM | EET only |
| 5:00 PM | 8:00 AM | — |
| 6:00 PM | 9:00 AM | MST only |
| 7:00 PM | 10:00 AM | MST only |
| 8:00 PM | 11:00 AM | MST only |
| 9:00 PM | 12:00 PM | MST only |
| 10:00 PM | 1:00 PM | MST only |
| 11:00 PM | 2:00 PM | MST only |
What EET and MST Actually Are
EET — Eastern European Time
Athens, Helsinki, Bucharest, Kyiv, Cairo, Beirut. Standing at UTC+2:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, October 25, 2026, to EET.
Eastern European Time is where the EU's synchronized clock changes meet countries that set their own dates, so the boundary between EET and its neighbors is less tidy than it looks.
MST — Mountain Standard Time
Denver, Salt Lake City, Calgary — and Phoenix year-round. Standing at UTC-7:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, November 1, 2026, to MST. Arizona stays on MST all year, so Phoenix and Denver are an hour apart for eight months and identical for four.
Arizona has stayed on MST year-round since 1968 — the Navajo Nation within it does observe daylight saving, making the state a patchwork.
What This Means in Practice
Both sides change clocks, on different dates
Both regions observe daylight saving but do not switch on the same day, so for a week or two each spring and fall the gap between them is an hour different from the rest of the year. Those short windows are where recurring invitations quietly break.
Major Cities in Each Zone
Cities on EET
Cities on MST
Frequently Asked Questions
What is the time difference between EET and MST?
MST is 9 hours behind EET.
What is 9:00 AM EET in MST?
9:00 AM EET is 12:00 AM MST.
What are the best hours to schedule a call between EET and MST?
Standard business hours in these two zones do not overlap at all, so one side has to work outside the 9-to-5. The most workable window is 4:00 PM to 10:00 PM EET, which is 7:00 AM to 1:00 PM MST.
Does the difference between EET and MST change during the year?
Yes. Both regions observe daylight saving, and they do not switch on the same dates, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, October 25, 2026.
Does MST always mean Mountain Standard Time?
Arizona stays on MST all year, so Phoenix and Denver are an hour apart for eight months and identical for four.