What time zone is Rosny-sur-Seine in?

Rosny-sur-Seine uses Central European Time (CET, UTC+1) in winter and Central European Summer Time (CEST, UTC+2) in summer. Its IANA time zone is Europe/Paris.

When is the next clock change in Rosny-sur-Seine?

Clocks in Rosny-sur-Seine move backward 1 hour on Sunday, October 25, 2026 at 3:00 AM, changing from CEST (UTC+02:00) to CET (UTC+01:00)

Does Rosny-sur-Seine observe daylight saving time?

Yes. Rosny-sur-Seine observes daylight saving time: CEST (UTC+2) in summer and CET (UTC+1) in winter.

What is the UTC offset of Rosny-sur-Seine?

Rosny-sur-Seine is UTC+1 in winter and UTC+2 in summer

Current Time in Rosny-sur-Seine, Yvelines, Île-de-France, France

6:28:16 PM

18:28:16

Friday, October 16, 2026

CEST (Central European Summer Time) · UTC+02:00

Europe/Paris

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Time zone details

Rosny-sur-Seine is observing daylight saving time in 2026

Daylight in Rosny-sur-Seine

Sunrise8:15 AMSolar noon1:39 PMSunset7:01 PM

Next clock changeOct 25, 2026 · Clocks move back 1 hour · in 8 daysUpcomingView details Weather nowLoading current forecast…Forecast details

Location facts

Place

Country: France
Administrative area: Île-de-France
District: Yvelines
Place type: Populated place
Country currency: Euro (EUR)

Practical

Country languages: French, Arpitan, Breton, Corsican, Catalan, Basque, Occitan
Dialing code: +33
Population: 4,936
Elevation: Approximately 35 m (DEM estimate)

Geography

Geographic coordinates: 48° 59' N / 1° 37' E

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Clock changes in Rosny-sur-Seine

Next clock change

Upcoming

Sunday, October 25, 2026

3:00 AM CEST2:00 AM CET

Clocks move back 1 hour

Sunday, March 29, 2026past
Daylight saving time starts
2:00 AM CET3:00 AM CEST
Clocks move forward 1 hour
Sunday, October 25, 2026upcoming
Daylight saving time ends
3:00 AM CEST2:00 AM CET
Clocks move back 1 hour

Future clock changes, 2027–2030

France daylight saving time Clock changes worldwide

Sun & Moon details

Sunrise: 8:15 AM
Solar noon: 1:39 PM
Sunset: 7:01 PM
Daylight duration: 10 hr 46 min3 min 30 sec shorter than the previous day

Civil twilight: 7:43 AM – 7:33 PM
Nautical twilight: 7:06 AM – 8:10 PM
Astronomical twilight: 6:30 AM – 8:47 PM

Waxing CrescentMoon illumination29%

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Friday, October 16, 2026

View Rosny-sur-Seine on SavvyTime's time-zone map

Sun

Sunrise: 8:15 AM (east, 102.7°)
Sunset: 7:01 PM (west, 257.1°)
Day length: 10 hr 46 min3 min 30 sec shorter than the previous day
Solar noon: 1:39 PM (32.0° altitude)

Civil twilight

Dawn to dusk: 7:43 AM – 7:33 PM

Additional twilight

Nautical dawn to dusk: 7:06 AM – 8:10 PM
Astronomical dawn to dusk: 6:30 AM – 8:47 PM

Moon

Phase: Waxing Crescent (29% illuminated)
Moonrise: 2:42 PM (southeast, 135.4°)
Moonset: 9:59 PM (southwest, 225.0°)
Previous principal phase: New Moon — Saturday, October 10, 2026 at 5:50 PM
Next principal phase: First Quarter — Sunday, October 18, 2026 at 6:13 PM

Seven-day daylight outlook

Sunrise, sunset, and daylight for seven local dates
Local date	Sunrise	Sunset	Day length	Daily change
Friday, October 16	8:15 AM	7:01 PM	10 hr 46 min	3 min 30 sec shorter than the previous day
Saturday, October 17	8:16 AM	6:59 PM	10 hr 43 min	3 min 29 sec shorter than the previous day
Sunday, October 18	8:18 AM	6:57 PM	10 hr 39 min	3 min 29 sec shorter than the previous day
Monday, October 19	8:20 AM	6:56 PM	10 hr 36 min	3 min 28 sec shorter than the previous day
Tuesday, October 20	8:21 AM	6:54 PM	10 hr 33 min	3 min 27 sec shorter than the previous day
Wednesday, October 21	8:23 AM	6:52 PM	10 hr 29 min	3 min 27 sec shorter than the previous day
Thursday, October 22	8:24 AM	6:50 PM	10 hr 26 min	3 min 26 sec shorter than the previous day

Weather forecast for Rosny-sur-Seine

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Plan around Rosny-sur-Seine

Upcoming national public holidays in France

Sun, Nov 1, 2026All Saints' Day
Wed, Nov 11, 2026Armistice Day
Fri, Dec 25, 2026Christmas Day

Nearby places

Browse places in France

Frequently asked questions

What time zone is Rosny-sur-Seine in?: Rosny-sur-Seine uses Central European Time (CET, UTC+1) in winter and Central European Summer Time (CEST, UTC+2) in summer. Its IANA time zone is Europe/Paris.
When is the next clock change in Rosny-sur-Seine?: Clocks in Rosny-sur-Seine move backward 1 hour on Sunday, October 25, 2026 at 3:00 AM, changing from CEST (UTC+02:00) to CET (UTC+01:00)
Does Rosny-sur-Seine observe daylight saving time?: Yes. Rosny-sur-Seine observes daylight saving time: CEST (UTC+2) in summer and CET (UTC+1) in winter.
What is the UTC offset of Rosny-sur-Seine?: Rosny-sur-Seine is UTC+1 in winter and UTC+2 in summer