Lisbon to Waltham, MA: time difference
Waltham, 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 12:27 12:27 PM Waltham, MA 07:27 7:27 AM You –:–
12:27 12:27 PM
Western European Summer Time · UTC+1
☀️ 07:49 · 🌙 18:56
07:27 7:27 AM
Eastern Daylight Time · UTC-4
☀️ 07:02 · 🌙 18:00
·
−5 h
Waltham, MA is 5 h behind Lisbon.
When you, Lisbon and Waltham, 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
🇺🇸 Waltham, 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 | 🇺🇸 Waltham, MA |
|---|---|---|
| Local time | 12:27 | 07:27 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 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 | 07:49 | 07:02 |
| Sunset | 18:56 | 18:00 |
| Daylight | 11 h 7 min | 10 h 58 min |
| People on this clock | 545,923 | 60,636 |
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 Waltham, MA: common questions
What is the time difference between Lisbon and Waltham, MA?
Waltham is 5 hours behind: it uses UTC−4, while Lisbon is on UTC+1.
If it is 9:00 AM in Lisbon, what time is it in Waltham, MA?
At 9:00 AM in Lisbon, clocks in Waltham show 4:00 AM.
If it is 6:00 PM in Lisbon, what time is it in Waltham, MA?
At 6:00 PM in Lisbon, clocks in Waltham show 1:00 PM.
Is there a time when both Lisbon and Waltham, MA, are at work?
Yes: from 2:00 PM to 6:00 PM in Lisbon (9:00 AM to 1:00 PM in Waltham), the working days (9:00 AM–6:00 PM) overlap.
Until what time in Lisbon is it still yesterday in Waltham, MA?
Before 5:00 AM in Lisbon, the date in Waltham has not changed yet. From 7:00 PM in Waltham, it is already the next day in Lisbon.
Does the time gap between Lisbon and Waltham, MA, change during the year?
Yes, because the clocks in Lisbon and in Waltham change on different dates. Next change: from October 25, 2026, Waltham will be 4 hours behind Lisbon.
