Offset
The time difference between Mountain Time and Sofia is 9 hours.
Mountain Time (MDT) is behind Sofia (EEST).
MDT: UTC-6
EEST: UTC+3
Both zones are currently observing daylight saving time.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Mountain Time and Sofia don't overlap on the same weekday. Sofia is 9 hours ahead of Mountain Time.
With some flexibility, there’s a workable window outside standard hours:
- 7 AM–11 AM in Mountain Time (4 PM–8 PM in Sofia) — suggest 9:00 AM Mountain Time (6:00 PM Sofia).
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.
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
Bulgaria
- New Year's DayThu, Jan 1
- Currency change dayFri, Jan 2
- Liberation DayTue, Mar 3
- Good FridayFri, Apr 10
- Holy SaturdaySat, Apr 11
- Easter SundaySun, Apr 12
- Easter MondayMon, Apr 13
- International Workers' DayFri, May 1
- Saint George's DayWed, May 6
- Saints Cyril and Methodius DayMon, May 25
- Unification DayMon, Sep 7
- Independence DayTue, Sep 22
- Christmas EveThu, Dec 24
- Christmas DayFri, Dec 25
- Second day of ChristmasSat, Dec 26
About these zones
Mountain Time is also known as MST, or MDT. To call United States, dial +1.
Sofia uses Eastern European Time (EET, or EEST). To call Bulgaria, dial +359.
Sofia is approximately 5,900 miles northeast of Mountain Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| MST | Sofia | Day |
|---|---|---|
| 12:00 am | 9:00 am | Same day |
| 1:00 am | 10:00 am | Same day |
| 2:00 am | 11:00 am | Same day |
| 3:00 am | 12:00 pm | Same day |
| 4:00 am | 1:00 pm | Same day |
| 5:00 am | 2:00 pm | Same day |
| 6:00 am | 3:00 pm | Same day |
| 7:00 am | 4:00 pm | Same day |
| 8:00 am | 5:00 pm | Same day |
| 9:00 am | 6:00 pm | Same day |
| 10:00 am | 7:00 pm | Same day |
| 11:00 am | 8:00 pm | Same day |
| 12:00 pm | 9:00 pm | Same day |
| 1:00 pm | 10:00 pm | Same day |
| 2:00 pm | 11:00 pm | Same day |
| 3:00 pm | 12:00 am | +1 day |
| 4:00 pm | 1:00 am | +1 day |
| 5:00 pm | 2:00 am | +1 day |
| 6:00 pm | 3:00 am | +1 day |
| 7:00 pm | 4:00 am | +1 day |
| 8:00 pm | 5:00 am | +1 day |
| 9:00 pm | 6:00 am | +1 day |
| 10:00 pm | 7:00 am | +1 day |
| 11:00 pm | 8:00 am | +1 day |
Daylight saving time
Both zones observe daylight saving time, but they transition on different dates.
Mountain Time: next transition on Sunday, November 1, 2026.
Sofia: next transition on Sunday, October 25, 2026.
For approximately 7 days between transitions, the offset between Mountain Time and Sofia 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
- 5:33 AM
- Sunset
- 8:28 PM
- Day length
- 14h 56m
- Sunrise
- 5:49 AM
- Sunset
- 9:05 PM
- Day length
- 15h 15m
Daylight overlap: 6h 32m — 5:33 AM–12:05 PM in Mountain Time (2:33 PM–9:05 PM in Sofia). 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 Mountain Time
- BJC
- DEN
- OGD
- SLC
Airports in Eastern European Time
- SOF
Related conversions
Common conversions
- What is 9:00 am MST in Sofia?
- 9:00 am MST is 6:00 pm Sofia.
- What is 12:00 pm MST in Sofia?
- 12:00 pm MST is 9:00 pm Sofia.
- What is 12:30 pm MST in Sofia?
- 12:30 pm MST is 9:30 pm Sofia.
- What is 2:00 pm MST in Sofia?
- 2:00 pm MST is 11:00 pm Sofia.
- What is 5:00 pm MST in Sofia?
- 5:00 pm MST is 2:00 am Sofia, the next day.
- What is 11:30 pm MST in Sofia?
- 11:30 pm MST is 8:30 am Sofia, the next day.