Istanbul and Karachi working-hours overlap
On Monday, 28 September 2026, Istanbul is 2 hours behind Karachi — UTC+03:00 against UTC+05:00. Their working hours overlap for 6 hours that day, between 06:00–12:00 UTC — 09:00–15:00 in Istanbul and 11:00–17:00 in Karachi. Neither Istanbul nor Karachi changes clocks, so this window is the same all year.
Every figure on this page describes Monday, 28 September 2026 — a fixed day, not the day you are reading it. Working hours are 09:00–17:00 local time for both cities; change either, or pick another date, in the overlap calculator.
Shared working hours
Everyone is at work between 06:00–12:00 UTC — 6 hours.
| City | Local time | Offset |
|---|---|---|
| Istanbul | 09:00–15:00 | UTC+03:00 |
| Karachi | 11:00–17:00 | UTC+05:00 |
Each city's working day
| City | Local hours | In UTC | Offset | Next clock change |
|---|---|---|---|---|
| Istanbul | 09:00–17:00 | 06:00–14:00 UTC | UTC+03:00 | No daylight saving |
| Karachi | 09:00–17:00 | 04:00–12:00 UTC | UTC+05:00 | No daylight saving |
The shared window through the year
Neither Istanbul nor Karachi changes clocks, so the gap between them is constant. Every month sampled gives the same window, 06:00–12:00 UTC.
| Month | Shared window | Length |
|---|---|---|
| 2026-10 | 06:00–12:00 UTC | 6 hours |
| 2026-11 | 06:00–12:00 UTC | 6 hours |
| 2026-12 | 06:00–12:00 UTC | 6 hours |
| 2027-01 | 06:00–12:00 UTC | 6 hours |
| 2027-02 | 06:00–12:00 UTC | 6 hours |
| 2027-03 | 06:00–12:00 UTC | 6 hours |
| 2027-04 | 06:00–12:00 UTC | 6 hours |
| 2027-05 | 06:00–12:00 UTC | 6 hours |
| 2027-06 | 06:00–12:00 UTC | 6 hours |
| 2027-07 | 06:00–12:00 UTC | 6 hours |
| 2027-08 | 06:00–12:00 UTC | 6 hours |
| 2027-09 | 06:00–12:00 UTC | 6 hours |
Questions
- What time can Istanbul and Karachi meet?
- 06:00–12:00 UTC on Monday, 28 September 2026 — 6 hours. In Istanbul that is 09:00–15:00, and in Karachi it is 11:00–17:00.
- How far apart are Istanbul and Karachi?
- On Monday, 28 September 2026, Istanbul is 2 hours behind Karachi — UTC+03:00 against UTC+05:00. Neither Istanbul nor Karachi changes clocks, so this window is the same all year.
- Does the overlap between Istanbul and Karachi change through the year?
- The shared window is the same in every month of the twelve months from Monday, 28 September 2026: 06:00–12:00 UTC.
Related city pairs
- Honolulu and Istanbul
- Honolulu and Karachi
- San Francisco and Istanbul
- San Francisco and Karachi
- Denver and Istanbul
- Denver and Karachi
Or read how overlap is calculated and the other questions people ask about scheduling across time zones.