EAT to MST Time Converter
MST is 9 hours behind EAT. EAT is UTC+3:00, and The US Mountain states are currently on MDT (UTC-6:00).
Best Time to Call Between EAT 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 EAT, which is 7:00 AM to 1:00 PM MST.
both at work EAT only MST only neither — hours along the strip are EAT.
Common Times Converted
EAT on the left, MST on the right.
EAT to MST: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| EAT | 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 | EAT only |
| 10:00 AM | 1:00 AM | EAT only |
| 11:00 AM | 2:00 AM | EAT only |
| 12:00 PM | 3:00 AM | EAT only |
| 1:00 PM | 4:00 AM | EAT only |
| 2:00 PM | 5:00 AM | EAT only |
| 3:00 PM | 6:00 AM | EAT only |
| 4:00 PM | 7:00 AM | EAT 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 EAT and MST Actually Are
EAT — East Africa Time
Nairobi, Addis Ababa, Dar es Salaam, Kampala, Mogadishu. Standing at UTC+3:00 as written, and the region does not change its clocks, so that offset holds all year.
East Africa Time is shared by a run of countries down the Rift Valley, and Ethiopia additionally keeps a traditional 12-hour clock that starts counting at dawn.
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
This gap is not fixed
MST changes its clocks and EAT does not, so the difference between them moves by an hour twice a year. A recurring meeting set now will drift for one side from Sunday, November 1, 2026 unless someone resets it.
Major Cities in Each Zone
Cities on EAT
Cities on MST
Frequently Asked Questions
What is the time difference between EAT and MST?
MST is 9 hours behind EAT. That is the live figure. Taken strictly as written, the gap between EAT and MST is 10 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM EAT in MST?
9:00 AM EAT is 12:00 AM MST.
What are the best hours to schedule a call between EAT 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 EAT, which is 7:00 AM to 1:00 PM MST.
Does the difference between EAT and MST change during the year?
Yes. MST observes daylight saving and EAT does not, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, November 1, 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.