Herisau to Istanbul time converter
Istanbul is 1 hour ahead of Herisau. When it is 9:00 AM in Herisau, it is 10:00 AM in Istanbul.
12:15 AM in Herisau, Wednesday, October 21, 2026
Herisau to Istanbul conversion table
Every hour of today in Herisau and the matching time in Istanbul. Light rows are typical working hours (9:00–18:00).
| Herisau | Istanbul |
|---|---|
| 12:00 AM | 1:00 AM |
| 1:00 AM | 2:00 AM |
| 2:00 AM | 3:00 AM |
| 3:00 AM | 4:00 AM |
| 4:00 AM | 5:00 AM |
| 5:00 AM | 6:00 AM |
| 6:00 AM | 7:00 AM |
| 7:00 AM | 8:00 AM |
| 8:00 AM | 9:00 AM |
| 9:00 AM | 10:00 AM |
| 10:00 AM | 11:00 AM |
| 11:00 AM | 12:00 PM |
| 12:00 PM | 1:00 PM |
| 1:00 PM | 2:00 PM |
| 2:00 PM | 3:00 PM |
| 3:00 PM | 4:00 PM |
| 4:00 PM | 5:00 PM |
| 5:00 PM | 6:00 PM |
| 6:00 PM | 7:00 PM |
| 7:00 PM | 8:00 PM |
| 8:00 PM | 9:00 PM |
| 9:00 PM | 10:00 PM |
| 10:00 PM | 11:00 PM |
| 11:00 PM | 12:00 AM+1 day |
Best time to call or meet
Both sides are at work from 9:00 AM – 5:00 PM in Herisau (10:00 AM – 6:00 PM in Istanbul).
Daylight saving time and the difference
The difference changes during the year because Herisau and Istanbul switch clocks on different dates:
- Oct 21, 2026 – Oct 25, 2026: +1h
- Oct 25, 2026 – Mar 28, 2027: +2h
- Mar 28, 2027 – Oct 21, 2027: +1h
Distance
Herisau and Istanbul are 1,714 km (1,065 miles) apart in a straight line.
More conversions
Questions and answers
What is the time difference between Herisau and Istanbul?
Istanbul is 1 hour ahead of Herisau.
What time is it in Istanbul when it is 9 AM in Herisau?
When it is 9:00 AM in Herisau, it is 10:00 AM in Istanbul.
When is the best time to call Istanbul from Herisau?
Both sides are at work from 9:00 AM – 5:00 PM in Herisau (10:00 AM – 6:00 PM in Istanbul).
Does the time difference between Herisau and Istanbul change?
Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.