Porto to Williston time converter

Williston is 6 hours behind Porto. When it is 9:00 AM in Porto, it is 3:00 AM in Williston.

Porto WEST

Monday, October 19, 2026

Williston CDT

Sunday, October 18, 2026

Porto
Portugal
Mon, Oct 19
WESTUTC+1
Williston
North Dakota, United States
Sun, Oct 18
CDTUTC-5-6h
Finding your time zone…
Shared working hours (9:00–18:00)

Porto to Williston conversion table

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

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

Best time to call or meet

Both sides are at work from 3:00 PM – 6:00 PM in Porto (9:00 AM – 12:00 PM in Williston).

Daylight saving time and the difference

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

  • Oct 19, 2026 – Oct 25, 2026: -6h
  • Oct 25, 2026 – Nov 1, 2026: -5h
  • Nov 1, 2026 – Mar 14, 2027: -6h
  • Mar 14, 2027 – Mar 28, 2027: -5h
  • Mar 28, 2027 – Oct 19, 2027: -6h

Distance

Porto and Williston are 7,060 km (4,387 miles) apart in a straight line.

More conversions

Williston 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 WillistonLondon to WillistonLos Angeles to WillistonChicago to WillistonToronto to WillistonSão Paulo to WillistonParis to WillistonBerlin to WillistonMoscow to WillistonDubai to WillistonNew Delhi to WillistonBangkok to Williston

Questions and answers

What is the time difference between Porto and Williston?

Williston is 6 hours behind Porto.

What time is it in Williston when it is 9 AM in Porto?

When it is 9:00 AM in Porto, it is 3:00 AM in Williston.

When is the best time to call Williston from Porto?

Both sides are at work from 3:00 PM – 6:00 PM in Porto (9:00 AM – 12:00 PM in Williston).

Does the time difference between Porto and Williston change?

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