Clock changes in Istanbul
Turkey Europe/Istanbul No clock change
Standard time
UTC+3
TRT
Daylight saving time
Not observed
No seasonal offset
Next change
None
No change scheduled
Most recent change
None on record
No change in 10 years
No clock change
Istanbul stays on UTC+3 (TRT) every day of the year. There is no daylight saving period, so no hour is ever skipped or repeated, and an offset noted down for Istanbul stays correct indefinitely — at least until the rules change, which this page would reflect on the next build.
Differences with other places still move twice a year, but the movement comes from the other side. If a colleague is somewhere that observes daylight saving time, your gap with them changes when they switch, not when you do.
Past changes (2016–2025)
Most recent first. Useful when checking what a timestamp meant at the time it was recorded.
| Local date | Change | Clocks went | Offset after | Then called |
|---|---|---|---|---|
| March 27, 2016 | Forward 60 min | 02:59 → 04:00 | UTC+03:00 | TRT |
Why this matters for stored times
A clock change is the reason a future appointment should never be stored as an offset. Save
"2027-03-14 09:00 at Europe/Istanbul" and it resolves correctly whatever the rules
turn out to be. Save "2027-03-14 09:00 UTC+03:00" and you have
frozen today's rules into a date that may fall on the other side of a transition — or of a
change to the rules themselves.
Frequently asked questions
Does Istanbul change its clocks?
No. Istanbul keeps UTC+3 (TRT) all year and has no scheduled clock change through 2035. It has changed its clocks in the past — the historical section below lists when.
What happens to the hour that is skipped or repeated?
This does not arise in Istanbul: with no clock change there is no skipped or repeated hour, so every local time occurs exactly once on every date.
How far ahead can these dates be trusted?
They come from the IANA time zone database, which is what browsers and operating systems use, and they reflect the rules published today. Governments occasionally change or abolish daylight saving with only weeks of notice; when that happens the database is updated and this page is regenerated from it on the next build.
Cities that change at the same moment
Everywhere on Europe/Istanbul shares this exact schedule.