Istanbul and Seattle share no standard 9–5 working hours; the least disruptive option is 7:00 PM GMT+3 (9:00 AM PDT).
Plan a meeting →| Detail | Value |
|---|---|
| Time difference | 10h (Istanbul is ahead) |
| Istanbul 9–5 in Seattle time | 11:00 PM–7:00 AM PDT |
| Seattle 9–5 in Istanbul time | 7:00 PM–3:00 AM GMT+3 |
| Overlap window | None during standard 9–5 hours |
| Least disruptive slot | 7:00 PM GMT+3 = 9:00 AM PDT |
| DST transitions (this year) | Seattle: March 8 / November 1 |
A 10h time gap separates Istanbul (UTC+3) and Seattle (UTC-7). When you pick up your morning coffee in Seattle, your counterpart in Istanbul is already deep into their afternoon. Getting a meeting right means understanding exactly where those working days intersect.
No working-hours overlap means async-first is not optional — it's the architecture. Set up structured daily handoffs: a written summary at end-of-day in each timezone, a shared task board both sides update, and a weekly call at a mutually acceptable off-hours time. The rotation matters: don't let one region always take the 7 AM or the 10 PM slot.
The less obvious scheduling risk is daylight saving time mismatch. Istanbul and Seattle may not shift their clocks on the same date. A meeting booked as "10 AM IST" in January might show up as "11 AM IST" in a colleague's calendar in March if your calendar app doesn't handle DST transitions correctly. Check the DST note on this page before setting up recurring meetings.
For truly zero-overlap pairs, the most important investment is async infrastructure: a written daily digest each team can read at the start of their day, a shared decision log so nothing critical gets blocked waiting for a live reply, and a clear escalation path for genuine emergencies. With those in place, most distributed teams find they need far fewer live calls than they assumed.
Istanbul is UTC+3 and Seattle is UTC-7, a difference of 10h. This gap may shift by 1 hour during DST transitions.
There is no overlap during standard 9–17 hours. Consider a rotating schedule or an early/late meeting. TimeSync's standup planner can find the least-painful slot.
Yes, partially. Seattle observes daylight saving time; Istanbul does not. Seattle's clocks change around March 8 and November 1, shifting the gap between the two cities by 1 hour for part of the year.
Istanbul and Seattle have no overlap during standard 9 AM–5 PM business hours.
Under standard 9–5 schedules, no. The 10h gap means the two cities' business days do not overlap. Teams that need synchronous collaboration typically shift one side's hours, rotate the inconvenient slot fairly, or rely on async-first workflows with structured handoffs.