Lisbon to Back Bay time converter

Back Bay is 5 hours behind Lisbon. When it is 9:00 AM in Lisbon, it is 4:00 AM in Back Bay.

Lisbon WEST

Sunday, October 18, 2026

Back Bay EDT

Sunday, October 18, 2026

Lisbon
Portugal
Sun, Oct 18
WESTUTC+1
Back Bay
Massachusetts, United States
Sun, Oct 18
EDTUTC-4-5h
Finding your time zone…
Shared working hours (9:00–18:00)

Lisbon to Back Bay conversion table

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

LisbonBack Bay
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 Lisbon (9:00 AM – 1:00 PM in Back Bay).

Daylight saving time and the difference

The difference changes during the year because Lisbon and Back Bay switch clocks on different dates:

  • Oct 18, 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 18, 2027: -5h

Distance

Lisbon and Back Bay are 5,133 km (3,189 miles) apart in a straight line.

More conversions

Back Bay to LisbonLisbon to New YorkLisbon to LondonLisbon to Los AngelesLisbon to ChicagoLisbon to TorontoLisbon to São PauloLisbon to ParisLisbon to BerlinLisbon to MoscowLisbon to DubaiLisbon to New DelhiLisbon to Bangkok
New York to Back BayLondon to Back BayLos Angeles to Back BayChicago to Back BayToronto to Back BaySão Paulo to Back BayParis to Back BayBerlin to Back BayMoscow to Back BayDubai to Back BayNew Delhi to Back BayBangkok to Back Bay

Questions and answers

What is the time difference between Lisbon and Back Bay?

Back Bay is 5 hours behind Lisbon.

What time is it in Back Bay when it is 9 AM in Lisbon?

When it is 9:00 AM in Lisbon, it is 4:00 AM in Back Bay.

When is the best time to call Back Bay from Lisbon?

Both sides are at work from 2:00 PM – 6:00 PM in Lisbon (9:00 AM – 1:00 PM in Back Bay).

Does the time difference between Lisbon and Back Bay change?

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