Lisbon to Greenwich, CT: time difference
Greenwich, CT 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 05:51 5:51 AM Greenwich, CT 00:51 12:51 AM You –:–
05:51 5:51 AM
Western European Summer Time · UTC+1
☀️ 07:50 · 🌙 18:54
00:51 12:51 AM
Eastern Daylight Time · UTC-4
☀️ 07:10 · 🌙 18:11
·
−5 h
Greenwich, CT is 5 h behind Lisbon.
When you, Lisbon and Greenwich, CT 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
🇺🇸 Greenwich, CT
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 | 🇺🇸 Greenwich, CT |
|---|---|---|
| Local time | 05:51 | 00:51 |
| Local date | Monday, October 19, 2026 | Monday, October 19, 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 | 07:50 | 07:10 |
| Sunset | 18:54 | 18:11 |
| Daylight | 11 h 4 min | 11 h 1 min |
| People on this clock | 545,923 | 62,077 |
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 Greenwich, CT: common questions
What is the time difference between Lisbon and Greenwich, CT?
Greenwich 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 Greenwich, CT?
At 9:00 AM in Lisbon, clocks in Greenwich show 4:00 AM.
What time is it in Greenwich, CT, when it is 6:00 PM in Lisbon?
When it is 6:00 PM in Lisbon, it is 1:00 PM in Greenwich.
When do working hours in Lisbon and in Greenwich, CT, overlap?
Working hours (9:00 AM–6:00 PM) overlap from 2:00 PM to 6:00 PM in Lisbon, which is 9:00 AM to 1:00 PM in Greenwich.
When is it still the previous day in Greenwich, CT?
Until 5:00 AM in Lisbon it is still the previous day in Greenwich. The other way round, from 7:00 PM in Greenwich it is already the next day in Lisbon.
Is the time difference between Lisbon and Greenwich, CT, the same all year?
No. Both places use summer time, but they switch on different dates, so for a while the gap changes. From October 25, 2026, Greenwich will be 4 hours behind Lisbon.
