Athens to Guyancourt: time difference
Guyancourt is 1 h behind Athens. 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.
Athens 03:44 3:44 AM Guyancourt 02:44 2:44 AM You –:–
03:44 3:44 AM
Eastern European Summer Time · UTC+3
☀️ 07:40 · 🌙 18:41
02:44 2:44 AM
Central European Summer Time · UTC+2
☀️ 08:21 · 🌙 18:53
·
−1 h
Guyancourt is 1 h behind Athens.
When you, Athens 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
🇬🇷 Athens
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 | 🇬🇷 Athens | 🇫🇷 Guyancourt |
|---|---|---|
| Local time | 03:44 | 02:44 |
| 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 Athens | — | −1 h |
| IANA zone | Europe/Athens | Europe/Paris |
| Daylight saving | On summer time → UTC+2, Oct 25, 03:00 | On summer time → UTC+1, Oct 25, 02:00 |
| Sunrise | 07:40 | 08:21 |
| Sunset | 18:41 | 18:53 |
| Daylight | 11 h 1 min | 10 h 32 min |
| People on this clock | 3,090,508 | 29,406 |
Compare Athens with another city
More comparisons with Athens: the time zones next to it and the far side of the clock.
Big time differences
Athens and Guyancourt: common questions
How many hours behind Athens is Guyancourt?
The clocks in Guyancourt are 1 hour behind those in Athens (UTC+2 and UTC+3).
What time is it in Guyancourt at the start of the working day in Athens?
The working day in Athens starts at 9:00 AM; in Guyancourt it is 8:00 AM at that moment.
What time is it in Guyancourt at the end of the working day in Athens?
The working day in Athens ends at 6:00 PM; in Guyancourt it is 5:00 PM at that moment.
When do working hours in Athens and in Guyancourt overlap?
Working hours (9:00 AM–6:00 PM) overlap from 10:00 AM to 6:00 PM in Athens, which is 9:00 AM to 5:00 PM in Guyancourt.
When is it still the previous day in Guyancourt?
Until 1:00 AM in Athens it is still the previous day in Guyancourt. The other way round, from 11:00 PM in Guyancourt it is already the next day in Athens.
Does the time difference between Athens and Guyancourt change?
No. The clocks in Athens and in Guyancourt change on the same dates, so the difference stays 1 hour.
