Offset
The time difference between Lisbon and Mountain Time is 7 hours.
Lisbon (BST) is ahead of Mountain Time (MDT).
BST: UTC+1
MDT: UTC-6
Both zones are currently observing daylight saving time.
When to schedule
Business-hours overlap: 4 PM–5 PM in Lisbon (9 AM–10 AM in Mountain Time).
Both teams are in working hours during this window on weekdays.
Suggested time: 4:00 PM Lisbon (9:00 AM Mountain Time).
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.
Portugal
- New Year's DayThu, Jan 1
- CarnivalTue, Feb 17
- Good FridayFri, Apr 3
- Easter SundaySun, Apr 5
- Freedom DaySat, Apr 25
- Labour DayFri, May 1
- Corpus ChristiThu, Jun 4
- National DayWed, Jun 10
- Assumption DaySat, Aug 15
- Republic DayMon, Oct 5
- All Saints DaySun, Nov 1
- Restoration of IndependenceTue, Dec 1
- Immaculate ConceptionTue, Dec 8
- Christmas DayFri, Dec 25
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
Lisbon uses Greenwich Mean Time (GMT, or BST). To call Portugal, dial +351.
Mountain Time is also known as MST, or MDT. To call United States, dial +1.
Mountain Time is approximately 4,850 miles northwest of Lisbon.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Lisbon | MST | Day |
|---|---|---|
| 12:00 am | 5:00 pm | -1 day |
| 1:00 am | 6:00 pm | -1 day |
| 2:00 am | 7:00 pm | -1 day |
| 3:00 am | 8:00 pm | -1 day |
| 4:00 am | 9:00 pm | -1 day |
| 5:00 am | 10:00 pm | -1 day |
| 6:00 am | 11:00 pm | -1 day |
| 7:00 am | 12:00 am | Same day |
| 8:00 am | 1:00 am | Same day |
| 9:00 am | 2:00 am | Same day |
| 10:00 am | 3:00 am | Same day |
| 11:00 am | 4:00 am | Same day |
| 12:00 pm | 5:00 am | Same day |
| 1:00 pm | 6:00 am | Same day |
| 2:00 pm | 7:00 am | Same day |
| 3:00 pm | 8:00 am | Same day |
| 4:00 pm | 9:00 am | Same day |
| 5:00 pm | 10:00 am | Same day |
| 6:00 pm | 11:00 am | Same day |
| 7:00 pm | 12:00 pm | Same day |
| 8:00 pm | 1:00 pm | Same day |
| 9:00 pm | 2:00 pm | Same day |
| 10:00 pm | 3:00 pm | Same day |
| 11:00 pm | 4:00 pm | Same day |
Daylight saving time
Both zones observe daylight saving time, but they transition on different dates.
Lisbon: 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 Lisbon 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
- 6:27 AM
- Sunset
- 8:59 PM
- Day length
- 14h 32m
- Sunrise
- 5:47 AM
- Sunset
- 8:26 PM
- Day length
- 14h 39m
Cities in these zones
Cities in Mountain Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Greenwich Mean Time
- CAT
- LIS
Airports in Mountain Time
- BJC
- DEN
- OGD
- SLC
Related conversions
Common conversions
- What is 9:00 am Lisbon in MST?
- 9:00 am Lisbon is 2:00 am MST.
- What is 12:00 pm Lisbon in MST?
- 12:00 pm Lisbon is 5:00 am MST.
- What is 12:30 pm Lisbon in MST?
- 12:30 pm Lisbon is 5:30 am MST.
- What is 2:00 pm Lisbon in MST?
- 2:00 pm Lisbon is 7:00 am MST.
- What is 5:00 pm Lisbon in MST?
- 5:00 pm Lisbon is 10:00 am MST.
- What is 11:30 pm Lisbon in MST?
- 11:30 pm Lisbon is 4:30 pm MST.