Current local time in GuyancourtÎle-de-France, France
––:––
Europe/ParisUTC+1 / UTC+2
Guyancourt keeps Central European Standard Time (CET, UTC+1) in winter and Central European Summer Time (CEST, UTC+2) in summer. Its IANA time zone is Europe/Paris.
Daylight saving time in Guyancourt
Guyancourt changes its clocks twice a year. The next changes, from the IANA time zone database as of October 2026:
- Sun, Oct 25, 2026: clocks go back 1 hour to UTC+1
- Sun, Mar 28, 2027: clocks go forward 1 hour to UTC+2
Cities on the same time as Guyancourt
These places show the same clock as Guyancourt every day of the coming year, clock changes included.
Guyancourt time zone at a glance
- IANA time zone
- Europe/Paris
- UTC offset
- UTC+1 / UTC+2
- Daylight saving
- Observed
- Next clock change
- Sun, Oct 25, 2026 → UTC+1
- Country
- France
- Region
- Île-de-France
- Coordinates
- 48.77°, 2.07°
- Population
- 31,989
- Local date
- —
Sunrise and sunset in Guyancourt today
Computed from Guyancourt's latitude and longitude for the current local date. Times shift by a minute or two either side depending on elevation and the horizon you actually see.
- Sunrise
- —
- Sunset
- —
- Solar noon
- —
- Day length
- —
- Civil dawn
- —
- Civil dusk
- —
- Golden hour ends
- —
- Golden hour begins
- —
Guyancourt time difference from major cities
| City | Local time now | Guyancourt is |
|---|---|---|
| New York CityUnited States | — | 6h ahead |
| LondonUnited Kingdom | — | 1h ahead |
| DubaiUnited Arab Emirates | — | 2h behind |
| SingaporeSingapore | — | 6h behind |
| TokyoJapan | — | 7h behind |
| SydneyAustralia | — | 9h behind |
Need a different pair? Compare any two cities or convert a specific time.
Guyancourt time: questions and answers
- What time is it in Guyancourt right now?
- The clock at the top of this page shows the live local time in Guyancourt, updated every second from your device's clock. Guyancourt keeps Central European Standard Time (CET, UTC+1) in winter and Central European Summer Time (CEST, UTC+2) in summer.
- What time zone is Guyancourt in?
- Guyancourt is in the IANA time zone Europe/Paris: Central European Standard Time (CET, UTC+1) in winter and Central European Summer Time (CEST, UTC+2) in summer.
- Does Guyancourt observe daylight saving time?
- Yes. Upcoming changes: Sun, Oct 25, 2026: clocks go back 1 hour to UTC+1; Sun, Mar 28, 2027: clocks go forward 1 hour to UTC+2.
- Which cities share Guyancourt's time?
- Paris, Marseille, Lyon, Toulouse, Nice, Nantes keep the same clock as Guyancourt all year.
Planning something with Guyancourt?
- Find a meeting time — the hours that overlap between Guyancourt and your team.
- Convert a time — turn a time in Guyancourt into yours, or the other way round.
- Compare office hours — when Guyancourt offices and yours are both open.
- Send a calendar invite — with the Europe/Paris time zone set correctly.