Current time in
Guyancourt, France
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Guyancourt time, compared side by side.
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About time in Guyancourt
Guyancourt has a population of around 31,989.
Guyancourt keeps UTC+1 during standard time and shifts to UTC+2 when daylight saving is in effect, so its offset from UTC changes twice a year. 300 other cities listed here keep the same time.
Daylight in Guyancourt ranges from about 8 hours 3 minutes at the December solstice to roughly 15 hours 57 minutes in June, a swing of about 7 hours 55 minutes.
The city lies at 48.77°N, 2.07°E in Europe, which is what the sunrise, sunset and day-length figures above are calculated from.