Bucharest to Guyancourt: time difference
Guyancourt is 1 h behind Bucharest. 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.
Bucharest 03:43 3:43 AM Guyancourt 02:43 2:43 AM You –:–
03:43 3:43 AM
Eastern European Summer Time · UTC+3
☀️ 07:38 · 🌙 18:23
02:43 2:43 AM
Central European Summer Time · UTC+2
☀️ 08:21 · 🌙 18:53
·
−1 h
Guyancourt is 1 h behind Bucharest.
When you, Bucharest and Guyancourt are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇷🇴 Bucharest
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
🇫🇷 Guyancourt
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 | 🇷🇴 Bucharest | 🇫🇷 Guyancourt |
|---|---|---|
| Local time | 03:43 | 02:43 |
| Local date | Wednesday, October 21, 2026 | Wednesday, October 21, 2026 |
| Time zone | Eastern European Summer Time | Central European Summer Time |
| UTC offset | UTC+3 | UTC+2 |
| Offset from Bucharest | — | −1 h |
| IANA zone | Europe/Bucharest | Europe/Paris |
| Daylight saving | On summer time → UTC+2, Oct 25, 03:00 | On summer time → UTC+1, Oct 25, 02:00 |
| Sunrise | 07:38 | 08:21 |
| Sunset | 18:23 | 18:53 |
| Daylight | 10 h 45 min | 10 h 32 min |
| People on this clock | 1,883,425 | 29,406 |
Compare Bucharest with another city
More comparisons with Bucharest: the time zones next to it and the far side of the clock.
Big time differences
Bucharest and Guyancourt: common questions
How far behind Bucharest is Guyancourt?
Guyancourt is 1 hour behind Bucharest: UTC+2 against UTC+3.
What time is it in Guyancourt when it is 9:00 AM in Bucharest?
When it is 9:00 AM in Bucharest, it is 8:00 AM in Guyancourt.
What time is it in Guyancourt when it is 6:00 PM in Bucharest?
When it is 6:00 PM in Bucharest, it is 5:00 PM in Guyancourt.
Is there a time when both Bucharest and Guyancourt are at work?
Yes: from 10:00 AM to 6:00 PM in Bucharest (9:00 AM to 5:00 PM in Guyancourt), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Guyancourt compared with Bucharest?
The new day starts in Guyancourt later: until 1:00 AM in Bucharest, it is still the previous day there. From 11:00 PM in Guyancourt, Bucharest is already on the next day.
Is the time difference between Bucharest and Guyancourt the same all year?
Yes. Both places switch to summer time and back on the same dates, so the gap remains 1 hour.
