Guyancourt to Bucharest: time difference
Bucharest is 1 h ahead of 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 02:05 2:05 AM Bucharest 03:05 3:05 AM You –:–
02:05 2:05 AM
Central European Summer Time · UTC+2
☀️ 08:21 · 🌙 18:53
03:05 3:05 AM
Eastern European Summer Time · UTC+3
☀️ 07:38 · 🌙 18:23
·
+1 h
Bucharest is 1 h ahead of Guyancourt.
When you, Guyancourt and Bucharest 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
🇷🇴 Bucharest
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 0 12 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
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Time zones side by side
| Detail | 🇫🇷 Guyancourt | 🇷🇴 Bucharest |
|---|---|---|
| Local time | 02:05 | 03:05 |
| Local date | Wednesday, October 21, 2026 | Wednesday, October 21, 2026 |
| Time zone | Central European Summer Time | Eastern European Summer Time |
| UTC offset | UTC+2 | UTC+3 |
| Offset from Guyancourt | — | +1 h |
| IANA zone | Europe/Paris | Europe/Bucharest |
| Daylight saving | On summer time → UTC+1, Oct 25, 02:00 | On summer time → UTC+2, Oct 25, 03:00 |
| Sunrise | 08:21 | 07:38 |
| Sunset | 18:53 | 18:23 |
| Daylight | 10 h 32 min | 10 h 45 min |
| People on this clock | 29,406 | 1,883,425 |
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 Bucharest: common questions
How many hours ahead of Guyancourt is Bucharest?
The clocks in Bucharest are 1 hour ahead of those in Guyancourt (UTC+3 and UTC+2).
What time is it in Bucharest at the start of the working day in Guyancourt?
The working day in Guyancourt starts at 9:00 AM; in Bucharest it is 10:00 AM at that moment.
What time is it in Bucharest at the end of the working day in Guyancourt?
The working day in Guyancourt ends at 6:00 PM; in Bucharest it is 7:00 PM at that moment.
Is there a time when both Guyancourt and Bucharest are at work?
Yes: from 9:00 AM to 5:00 PM in Guyancourt (10:00 AM to 6:00 PM in Bucharest), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Bucharest compared with Guyancourt?
The new day starts in Bucharest earlier: at 11:00 PM in Guyancourt it is already midnight there. Until 1:00 AM in Bucharest, Guyancourt is still on the previous day.
Is the time difference between Guyancourt and Bucharest the same all year?
Yes. Both places switch to summer time and back on the same dates, so the gap remains 1 hour.
