Istanbul zone
GMT+3 (GMT+3)
Hong Kong zone
GMT+8 (GMT+8)
Difference
5 hours ahead of Istanbul
Business overlap
3h (9-5 windows)
Working hours overlap
Each cell is one hour in Istanbul. Filled cells mark when 9 AM – 5 PM in Istanbul and Hong Kong both apply.
3 hours per day
- Istanbul
- GMT+3
- Hong Kong
- GMT+8
- Difference
- +5h
- Business overlap
- 3h
Hour-by-hour conversion
Each row shows the matching local time in Hong Kong for an hour in Istanbul.
| Istanbul | Hong Kong | Day | Window |
|---|---|---|---|
| 12:00 AM | 5:00 AM | same day | — |
| 1:00 AM | 6:00 AM | same day | — |
| 2:00 AM | 7:00 AM | same day | — |
| 3:00 AM | 8:00 AM | same day | — |
| 4:00 AM | 9:00 AM | same day | — |
| 5:00 AM | 10:00 AM | same day | — |
| 6:00 AM | 11:00 AM | same day | — |
| 7:00 AM | 12:00 PM | same day | — |
| 8:00 AM | 1:00 PM | same day | — |
| 9:00 AM | 2:00 PM | same day | Both 9-5 |
| 10:00 AM | 3:00 PM | same day | Both 9-5 |
| 11:00 AM | 4:00 PM | same day | Both 9-5 |
| 12:00 PM | 5:00 PM | same day | — |
| 1:00 PM | 6:00 PM | same day | — |
| 2:00 PM | 7:00 PM | same day | — |
| 3:00 PM | 8:00 PM | same day | — |
| 4:00 PM | 9:00 PM | same day | — |
| 5:00 PM | 10:00 PM | same day | — |
| 6:00 PM | 11:00 PM | same day | — |
| 7:00 PM | 12:00 AM | next day | — |
| 8:00 PM | 1:00 AM | next day | — |
| 9:00 PM | 2:00 AM | next day | — |
| 10:00 PM | 3:00 AM | next day | — |
| 11:00 PM | 4:00 AM | next day | — |
Best meeting windows
If both teams keep standard 9 AM – 5 PM hours, the overlap window is roughly 9:00 AM – 12:00 PM in Istanbul time. That gives you 3 hours per workday for live meetings.
Tighter overlap is achievable by having the side with later working hours start earlier, or by treating the first and last hours of each side as flexible. The bar above marks every hour where both cities sit inside a 9 AM – 5 PM window.
About converting Istanbul time to Hong Kong time
Istanbul follows the Europe/Istanbul time zone (currently GMT+3, GMT+3), while Hong Kong follows Asia/Hong_Kong (currently GMT+8, GMT+8). Hong Kong is 5 hours ahead of Istanbul right now.
Neither city observes daylight saving time, so the offset between them is the same all year.
Reverse this conversion
Hong Kong to Istanbul
Open the converter
Plan a meeting between Istanbul and Hong Kong
More conversions from Istanbul
Frequently asked questions
- How many hours is Istanbul from Hong Kong?
- Hong Kong is 5 hours ahead of Istanbul right now.
- What time is 9:00 AM Istanbul in Hong Kong?
- 9:00 AM in Istanbul is 2:00 PM in Hong Kong.
- What time is 5:00 PM Istanbul in Hong Kong?
- 5:00 PM in Istanbul is 10:00 PM in Hong Kong.
- When do Istanbul and Hong Kong business hours overlap?
- Standard 9 AM - 5 PM working hours overlap for about 3 hours, roughly from 9:00 AM to 12:00 PM in Istanbul time.
- Does daylight saving time change the difference between Istanbul and Hong Kong?
- Neither Istanbul nor Hong Kong observes daylight saving time, so the offset between them is constant year-round.
Local time page
Time in Istanbul
Local time page
Time in Hong Kong