Porto to Mattapan time converter

Mattapan is 5 hours behind Porto. When it is 9:00 AM in Porto, it is 4:00 AM in Mattapan.

Porto WEST

Wednesday, October 21, 2026

Mattapan EDT

Wednesday, October 21, 2026

Porto
Portugal
Wed, Oct 21
WESTUTC+1
Mattapan
Massachusetts, United States
Wed, Oct 21
EDTUTC-4-5h
Finding your time zone…
Shared working hours (9:00–18:00)

Porto to Mattapan conversion table

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

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

Best time to call or meet

Both sides are at work from 2:00 PM – 6:00 PM in Porto (9:00 AM – 1:00 PM in Mattapan).

Daylight saving time and the difference

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

  • Oct 21, 2026 – Oct 25, 2026: -5h
  • Oct 25, 2026 – Nov 1, 2026: -4h
  • Nov 1, 2026 – Mar 14, 2027: -5h
  • Mar 14, 2027 – Mar 28, 2027: -4h
  • Mar 28, 2027 – Oct 21, 2027: -5h

Distance

Porto and Mattapan are 5,067 km (3,148 miles) apart in a straight line.

More conversions

Mattapan 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 MattapanLondon to MattapanLos Angeles to MattapanChicago to MattapanToronto to MattapanSão Paulo to MattapanParis to MattapanBerlin to MattapanMoscow to MattapanDubai to MattapanNew Delhi to MattapanBangkok to Mattapan

Questions and answers

What is the time difference between Porto and Mattapan?

Mattapan is 5 hours behind Porto.

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

When it is 9:00 AM in Porto, it is 4:00 AM in Mattapan.

When is the best time to call Mattapan from Porto?

Both sides are at work from 2:00 PM – 6:00 PM in Porto (9:00 AM – 1:00 PM in Mattapan).

Does the time difference between Porto and Mattapan change?

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