Guyancourt to Lisbon: time difference
Lisbon is 1 h behind Guyancourt. Live clocks for both, the working hours they share, and how each one sits against your own time.
−1 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Guyancourt 20:32 8:32 PM Lisbon 19:32 7:32 PM You –:–
20:32 8:32 PM
Central European Summer Time · UTC+2
☀️ 08:20 · 🌙 18:55
19:32 7:32 PM
Western European Summer Time · UTC+1
☀️ 07:51 · 🌙 18:53
·
−1 h
Lisbon is 1 h behind Guyancourt.
When you, Guyancourt and Lisbon are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇫🇷 Guyancourt
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
🇵🇹 Lisbon
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 19 7 PM 20 8 PM 21 9 PM 22 10 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇫🇷 Guyancourt | 🇵🇹 Lisbon |
|---|---|---|
| Local time | 20:32 | 19:32 |
| Local date | Tuesday, October 20, 2026 | Tuesday, October 20, 2026 |
| Time zone | Central European Summer Time | Western European Summer Time |
| UTC offset | UTC+2 | UTC+1 |
| Offset from Guyancourt | — | −1 h |
| IANA zone | Europe/Paris | Europe/Lisbon |
| Daylight saving | On summer time → UTC+1, Oct 25, 02:00 | On summer time → UTC+0, Oct 25, 01:00 |
| Sunrise | 08:20 | 07:51 |
| Sunset | 18:55 | 18:53 |
| Daylight | 10 h 35 min | 11 h 2 min |
| People on this clock | 29,406 | 545,923 |
Compare Guyancourt with another city
More comparisons with Guyancourt: the time zones next to it and the far side of the clock.
Big time differences
Guyancourt and Lisbon: common questions
How far behind Guyancourt is Lisbon?
Lisbon is 1 hour behind Guyancourt: UTC+1 against UTC+2.
What time is it in Lisbon when it is 9:00 AM in Guyancourt?
When it is 9:00 AM in Guyancourt, it is 8:00 AM in Lisbon.
What time is it in Lisbon when it is 6:00 PM in Guyancourt?
When it is 6:00 PM in Guyancourt, it is 5:00 PM in Lisbon.
Is there a time when both Guyancourt and Lisbon are at work?
Yes: from 10:00 AM to 6:00 PM in Guyancourt (9:00 AM to 5:00 PM in Lisbon), the working days (9:00 AM–6:00 PM) overlap.
When is it still the previous day in Lisbon?
Until 1:00 AM in Guyancourt it is still the previous day in Lisbon. The other way round, from 11:00 PM in Lisbon it is already the next day in Guyancourt.
Does the time gap between Guyancourt and Lisbon change during the year?
No – both places switch to and from summer time on the same dates, so the gap stays 1 hour.
