MST to EET
Denver to Athens.
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All date & timeQuestions
What time is EET when it is 12:00 MST?
21:00. Eastern European Time is 9 hours ahead of Mountain Time, all year round. There is no hour of the standard working day that is inside 9-to-5 in both Denver and Athens. One side has to take the call outside office hours, so it is worth agreeing which.
Is the difference between MST and EET the same all year?
Yes. Eastern European Time is 9 hours ahead of Mountain Time, all year round. Both zones change their clocks, and close enough to the same dates that the gap between them holds — apart from a week or two each spring and autumn when one has shifted and the other has not.
What do MST and EET actually stand for?
MST is Mountain Time, the zone covering Denver, currently UTC−7 in January. EET is Eastern European Time, covering Athens, at UTC+2. Arizona sits in this zone but does not change its clocks, so for eight months of the year Phoenix matches Los Angeles rather than Denver. It is the most common source of a missed call in North American scheduling.
Anything worth knowing about Eastern European Time?
Athens, Helsinki, Kyiv and Bucharest run an hour ahead of Paris and Berlin. The whole zone changes clocks on the same instant as the rest of the EU, at 01:00 UTC, so the one-hour gap to Central Europe never breaks.
When is a good time to call between Denver and Athens?
There is no hour of the standard working day that is inside 9-to-5 in both Denver and Athens. One side has to take the call outside office hours, so it is worth agreeing which. If the call has to happen outside that, the fairer arrangement is usually to alternate which side takes the awkward hour rather than always asking the same one.
How it works, and more about mst → eet
The difference, and whether you can rely on it
In January, Eastern European Time is 9 hours ahead of Mountain Time — UTC−7 against UTC+2. It stays that way all year, so the number is worth memorising if you work across these two often.
When you can both be at a desk
There is no hour inside 9-to-5 in both Denver and Athens. Whatever you schedule, one side is taking it outside working hours — so the useful question is not when to meet but who absorbs the inconvenience, and whether it alternates.
Reading the abbreviations literally will mislead you
MST strictly means one fixed offset, but almost nobody uses it that way. People write it to mean the time in Denver, which shifts if that city observes daylight saving — and it does. This page follows the common usage rather than the strict one, because the strict reading gives an answer that is wrong for a good part of the year.
Arizona sits in this zone but does not change its clocks, so for eight months of the year Phoenix matches Los Angeles rather than Denver. It is the most common source of a missed call in North American scheduling. Athens, Helsinki, Kyiv and Bucharest run an hour ahead of Paris and Berlin. The whole zone changes clocks on the same instant as the rest of the EU, at 01:00 UTC, so the one-hour gap to Central Europe never breaks.
Scheduling something recurring
For a one-off, the converter above is the whole job. For a standing meeting across zones it is worth putting the invitation in a calendar that stores the zone rather than the time — then the changeover is handled for you and nobody has to remember. If you are trying to find a slot across more than two places at once, the meeting planner shows a whole day at a glance instead.