Offset
The time difference between Athens and Mountain Time is 9 hours.
Athens (EEST) is ahead of Mountain Time (MDT).
EEST: UTC+3
MDT: UTC-6
Both zones are currently observing daylight saving time.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Athens and Mountain Time don't overlap on the same weekday. Mountain Time is 9 hours behind Athens.
With some flexibility, there’s a workable window outside standard hours:
- 4 PM–8 PM in Athens (7 AM–11 AM in Mountain Time) — suggest 6:00 PM Athens (9:00 AM Mountain Time).
This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
Greece
- New Year's DayThu, Jan 1
- EpiphanyTue, Jan 6
- Clean MondayMon, Feb 23
- AnnunciationWed, Mar 25
- Independence DayWed, Mar 25
- Good FridayFri, Apr 10
- Easter SundaySun, Apr 12
- Easter MondayMon, Apr 13
- Labour DayFri, May 1
- PentecostSun, May 31
- Whit MondayMon, Jun 1
- Assumption DaySat, Aug 15
- Ochi DayWed, Oct 28
- Christmas DayFri, Dec 25
- St. Stephen's DaySat, Dec 26
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
About these zones
Athens uses Eastern European Time (EET, or EEST). To call Greece, dial +30.
Mountain Time is also known as MST, or MDT. To call United States, dial +1.
Mountain Time is approximately 6,150 miles northwest of Athens.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Athens | MST | Day |
|---|---|---|
| 12:00 am | 3:00 pm | -1 day |
| 1:00 am | 4:00 pm | -1 day |
| 2:00 am | 5:00 pm | -1 day |
| 3:00 am | 6:00 pm | -1 day |
| 4:00 am | 7:00 pm | -1 day |
| 5:00 am | 8:00 pm | -1 day |
| 6:00 am | 9:00 pm | -1 day |
| 7:00 am | 10:00 pm | -1 day |
| 8:00 am | 11:00 pm | -1 day |
| 9:00 am | 12:00 am | Same day |
| 10:00 am | 1:00 am | Same day |
| 11:00 am | 2:00 am | Same day |
| 12:00 pm | 3:00 am | Same day |
| 1:00 pm | 4:00 am | Same day |
| 2:00 pm | 5:00 am | Same day |
| 3:00 pm | 6:00 am | Same day |
| 4:00 pm | 7:00 am | Same day |
| 5:00 pm | 8:00 am | Same day |
| 6:00 pm | 9:00 am | Same day |
| 7:00 pm | 10:00 am | Same day |
| 8:00 pm | 11:00 am | Same day |
| 9:00 pm | 12:00 pm | Same day |
| 10:00 pm | 1:00 pm | Same day |
| 11:00 pm | 2:00 pm | Same day |
Daylight saving time
Both zones observe daylight saving time, but they transition on different dates.
Athens: next transition on Sunday, October 25, 2026.
Mountain Time: next transition on Sunday, November 1, 2026.
For approximately 7 days between transitions, the offset between Athens and Mountain Time differs from its typical value. Recurring meetings during this window will shift by one hour.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 6:03 AM
- Sunset
- 8:47 PM
- Day length
- 14h 44m
- Sunrise
- 5:33 AM
- Sunset
- 8:28 PM
- Day length
- 14h 55m
Daylight overlap: 6h 14m — 2:33 PM–8:47 PM in Athens (5:33 AM–11:47 AM in Mountain Time). Both locations are in daylight during this window.
Cities in these zones
Cities in Mountain Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Eastern European Time
- ATH
Airports in Mountain Time
- BJC
- DEN
- OGD
- SLC
Related conversions
Common conversions
- What is 9:00 am Athens in MST?
- 9:00 am Athens is 12:00 am MST.
- What is 12:00 pm Athens in MST?
- 12:00 pm Athens is 3:00 am MST.
- What is 12:30 pm Athens in MST?
- 12:30 pm Athens is 3:30 am MST.
- What is 2:00 pm Athens in MST?
- 2:00 pm Athens is 5:00 am MST.
- What is 5:00 pm Athens in MST?
- 5:00 pm Athens is 8:00 am MST.
- What is 11:30 pm Athens in MST?
- 11:30 pm Athens is 2:30 pm MST.