Porto to Great Falls time converter

Great Falls is 7 hours behind Porto. When it is 9:00 AM in Porto, it is 2:00 AM in Great Falls.

Porto WEST

Tuesday, October 20, 2026

Great Falls MDT

Tuesday, October 20, 2026

Porto
Portugal
Tue, Oct 20
WESTUTC+1
Great Falls
Montana, United States
Tue, Oct 20
MDTUTC-6-7h
Finding your time zone…
Shared working hours (9:00–18:00)

Porto to Great Falls conversion table

Every hour of today in Porto and the matching time in Great Falls. Light rows are typical working hours (9:00–18:00).

PortoGreat Falls
12:00 AM5:00 PM−1 day
1:00 AM6:00 PM−1 day
2:00 AM7:00 PM−1 day
3:00 AM8:00 PM−1 day
4:00 AM9:00 PM−1 day
5:00 AM10:00 PM−1 day
6:00 AM11:00 PM−1 day
7:00 AM12:00 AM
8:00 AM1:00 AM
9:00 AM2:00 AM
10:00 AM3:00 AM
11:00 AM4:00 AM
12:00 PM5:00 AM
1:00 PM6:00 AM
2:00 PM7:00 AM
3:00 PM8:00 AM
4:00 PM9:00 AM
5:00 PM10:00 AM
6:00 PM11:00 AM
7:00 PM12:00 PM
8:00 PM1:00 PM
9:00 PM2:00 PM
10:00 PM3:00 PM
11:00 PM4:00 PM

Best time to call or meet

Both sides are at work from 4:00 PM – 6:00 PM in Porto (9:00 AM – 11:00 AM in Great Falls).

Daylight saving time and the difference

The difference changes during the year because Porto and Great Falls switch clocks on different dates:

  • Oct 20, 2026 – Oct 25, 2026: -7h
  • Oct 25, 2026 – Nov 1, 2026: -6h
  • Nov 1, 2026 – Mar 14, 2027: -7h
  • Mar 14, 2027 – Mar 28, 2027: -6h
  • Mar 28, 2027 – Oct 20, 2027: -7h

Distance

Porto and Great Falls are 7,570 km (4,704 miles) apart in a straight line.

More conversions

Great Falls to PortoPorto to New YorkPorto to LondonPorto to Los AngelesPorto to ChicagoPorto to TorontoPorto to São PauloPorto to ParisPorto to BerlinPorto to MoscowPorto to DubaiPorto to New DelhiPorto to Bangkok
New York to Great FallsLondon to Great FallsLos Angeles to Great FallsChicago to Great FallsToronto to Great FallsSão Paulo to Great FallsParis to Great FallsBerlin to Great FallsMoscow to Great FallsDubai to Great FallsNew Delhi to Great FallsBangkok to Great Falls

Questions and answers

What is the time difference between Porto and Great Falls?

Great Falls is 7 hours behind Porto.

What time is it in Great Falls when it is 9 AM in Porto?

When it is 9:00 AM in Porto, it is 2:00 AM in Great Falls.

When is the best time to call Great Falls from Porto?

Both sides are at work from 4:00 PM – 6:00 PM in Porto (9:00 AM – 11:00 AM in Great Falls).

Does the time difference between Porto and Great Falls change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.