What time zone is Gölcük in?

Gölcük uses Turkey Time (TRT, UTC+3) all year. Its IANA time zone is Europe/Istanbul.

Does Gölcük observe daylight saving time?

No. Gölcük uses TRT (UTC+3) all year.

Current Time in Gölcük, Gölcük İlçesi, Kocaeli, Turkey

12:50:42 AM

00:50:42

Sunday, November 1, 2026

TRT (Turkey Time) · UTC+03:00

Europe/Istanbul

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Time zone details

Gölcük does not observe daylight saving time in 2026

Daylight in Gölcük

Sunrise7:30 AMSolar noon12:44 PMSunset5:57 PM

Clock change statusNo clock changes are scheduled for Gölcük in the next 12 monthsView schedule Weather nowLoading current forecast…Forecast details

Location facts

Place

Country: Turkey
Administrative area: Kocaeli
District: Gölcük İlçesi
Place type: City or town
Country currency: Turkish Lira (TRY)

Practical

Country languages: Turkish, Kurdish, Zaza, Azerbaijani, Avaric
Dialing code: +90
Population: 56,189
Elevation: Approximately 56 m (DEM estimate)

Geography

Geographic coordinates: 40° 42' N / 29° 49' E

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Clock changes in Gölcük

No clock or time-zone designation changes in 2026

Future clock changes, 2027–2030

Turkey daylight saving time Clock changes worldwide

Sun & Moon details

Sunrise: 7:30 AM
Solar noon: 12:44 PM
Sunset: 5:57 PM
Daylight duration: 10 hr 26 min2 min 23 sec shorter than the previous day

Civil twilight: 7:02 AM – 6:25 PM
Nautical twilight: 6:30 AM – 6:57 PM
Astronomical twilight: 5:58 AM – 7:29 PM

Third QuarterMoon illumination56%

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Sunday, November 1, 2026

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Sun

Sunrise: 7:30 AM (east, 108.4°)
Sunset: 5:57 PM (west, 251.4°)
Day length: 10 hr 26 min2 min 23 sec shorter than the previous day
Solar noon: 12:44 PM (34.8° altitude)

Civil twilight

Dawn to dusk: 7:02 AM – 6:25 PM

Additional twilight

Nautical dawn to dusk: 6:30 AM – 6:57 PM
Astronomical dawn to dusk: 5:58 AM – 7:29 PM

Moon

Phase: Third Quarter (56% illuminated)
Moonrise: 11:57 PM (northeast, 64.3°)
Moonset: 2:01 PM (northwest, 298.3°)
Previous principal phase: Full Moon — Monday, October 26, 2026 at 7:12 AM
Next principal phase: Third Quarter — Sunday, November 1, 2026 at 11:28 PM

Seven-day daylight outlook

Sunrise, sunset, and daylight for seven local dates
Local date	Sunrise	Sunset	Day length	Daily change
Sunday, November 1	7:30 AM	5:57 PM	10 hr 26 min	2 min 23 sec shorter than the previous day
Monday, November 2	7:31 AM	5:56 PM	10 hr 24 min	2 min 22 sec shorter than the previous day
Tuesday, November 3	7:33 AM	5:54 PM	10 hr 22 min	2 min 20 sec shorter than the previous day
Wednesday, November 4	7:34 AM	5:53 PM	10 hr 19 min	2 min 20 sec shorter than the previous day
Thursday, November 5	7:35 AM	5:52 PM	10 hr 17 min	2 min 18 sec shorter than the previous day
Friday, November 6	7:36 AM	5:51 PM	10 hr 15 min	2 min 16 sec shorter than the previous day
Saturday, November 7	7:37 AM	5:50 PM	10 hr 13 min	2 min 16 sec shorter than the previous day

Weather forecast for Gölcük

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Plan around Gölcük

Upcoming national public holidays in Turkey

Fri, Jan 1, 2027New Year's Day
Tue, Mar 9, 2027End of Ramadan (Eid al-Fitr)
Fri, Apr 23, 2027National Sovereignty and Children's Day

Nearby places

Browse places in Turkey

Frequently asked questions

What time zone is Gölcük in?: Gölcük uses Turkey Time (TRT, UTC+3) all year. Its IANA time zone is Europe/Istanbul.
When is the next clock change in Gölcük?: No clock changes are scheduled for Gölcük in the next 12 months
Does Gölcük observe daylight saving time?: No. Gölcük uses TRT (UTC+3) all year.
What is the UTC offset of Gölcük?: Gölcük is UTC+3 all year