Lisbon to Boston, MA: time difference
Boston, MA is 5 h behind Lisbon. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Lisbon 02:17 2:17 AM Boston, MA 21:17 9:17 PM You –:–
02:17 2:17 AM
Western European Summer Time · UTC+1
☀️ 07:41 · 🌙 19:07
21:17 9:17 PM
Eastern Daylight Time · UTC-4
☀️ 06:51 · 🌙 18:14
·
−5 h
Boston, MA is 5 h behind Lisbon.
When you, Lisbon and Boston, MA are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇵🇹 Lisbon
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇺🇸 Boston, MA
19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM 0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇵🇹 Lisbon | 🇺🇸 Boston, MA |
|---|---|---|
| Local time | 02:17 | 21:17 |
| Local date | Saturday, October 10, 2026 | Friday, October 9, 2026 |
| Time zone | Western European Summer Time | Eastern Daylight Time |
| UTC offset | UTC+1 | UTC-4 |
| Offset from Lisbon | — | −5 h |
| IANA zone | Europe/Lisbon | America/New York |
| Daylight saving | On summer time → UTC+0, Oct 25, 01:00 | On summer time → UTC-5, Nov 1, 01:00 |
| Sunrise | 07:41 | 06:51 |
| Sunset | 19:07 | 18:14 |
| Daylight | 11 h 26 min | 11 h 23 min |
| People on this clock | 545,923 | 675,647 |
Compare Lisbon with another city
More comparisons with Lisbon: the time zones next to it and the far side of the clock.
Big time differences
Lisbon and Boston, MA: common questions
How far behind Lisbon is Boston, MA?
Boston is 5 hours behind Lisbon: UTC−4 against UTC+1.
What time is it in Boston, MA, when it is 9:00 AM in Lisbon?
When it is 9:00 AM in Lisbon, it is 4:00 AM in Boston.
What time is it in Boston, MA, when it is 6:00 PM in Lisbon?
When it is 6:00 PM in Lisbon, it is 1:00 PM in Boston.
When is a good time to call Boston, MA, from Lisbon?
Between 2:00 PM and 6:00 PM in Lisbon – that is 9:00 AM to 1:00 PM in Boston – both places are within working hours (9:00 AM–6:00 PM).
When is it still the previous day in Boston, MA?
Until 5:00 AM in Lisbon it is still the previous day in Boston. The other way round, from 7:00 PM in Boston it is already the next day in Lisbon.
Does the time difference between Lisbon and Boston, MA, change?
Yes. Both places change their clocks, but on different dates. From October 25, 2026, Boston will be 4 hours behind Lisbon.
