Offset
The time difference between Hanoi and Istanbul is 4 hours.
Hanoi (ICT) is ahead of Istanbul (TRT).
ICT: UTC+7
TRT: UTC+3
Neither Hanoi nor Istanbul is currently observing daylight saving time.
When to schedule
Business-hours overlap: 1 PM–5 PM in Hanoi (9 AM–1 PM in Istanbul).
Both teams are in working hours during this window on weekdays.
Suggested time: 3:00 PM Hanoi (11:00 AM Istanbul).
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
Vietnam
- New Year's DayThu, Jan 1
- Reunification DayThu, Apr 30
- Labour DayFri, May 1
- National DayWed, Sep 2
Turkey
- New Year's DayThu, Jan 1
- National Independence & Children's DayThu, Apr 23
- Labour DayFri, May 1
- Atatürk Commemoration & Youth DayTue, May 19
- Democracy and National Unity DayWed, Jul 15
- Victory DaySun, Aug 30
- Republic DayThu, Oct 29
About these zones
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Hanoi | Istanbul | Day |
|---|---|---|
| 12:00 am | 8:00 pm | -1 day |
| 1:00 am | 9:00 pm | -1 day |
| 2:00 am | 10:00 pm | -1 day |
| 3:00 am | 11:00 pm | -1 day |
| 4:00 am | 12:00 am | Same day |
| 5:00 am | 1:00 am | Same day |
| 6:00 am | 2:00 am | Same day |
| 7:00 am | 3:00 am | Same day |
| 8:00 am | 4:00 am | Same day |
| 9:00 am | 5:00 am | Same day |
| 10:00 am | 6:00 am | Same day |
| 11:00 am | 7:00 am | Same day |
| 12:00 pm | 8:00 am | Same day |
| 1:00 pm | 9:00 am | Same day |
| 2:00 pm | 10:00 am | Same day |
| 3:00 pm | 11:00 am | Same day |
| 4:00 pm | 12:00 pm | Same day |
| 5:00 pm | 1:00 pm | Same day |
| 6:00 pm | 2:00 pm | Same day |
| 7:00 pm | 3:00 pm | Same day |
| 8:00 pm | 4:00 pm | Same day |
| 9:00 pm | 5:00 pm | Same day |
| 10:00 pm | 6:00 pm | Same day |
| 11:00 pm | 7:00 pm | Same day |
Daylight saving time
Neither Hanoi nor Istanbul observes daylight saving time. The offset between these zones remains constant year-round.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:26 AM
- Sunset
- 6:41 PM
- Day length
- 13h 15m
- Sunrise
- 5:49 AM
- Sunset
- 8:34 PM
- Day length
- 14h 45m
Daylight overlap: 8h 53m — 9:49 AM–6:41 PM in Hanoi (5:49 AM–2:41 PM in Istanbul). Both locations are in daylight during this window.
Cities in these zones
Other cities in Indochina Time
Other cities in Turkey Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Indochina Time
- HAN
- BKK
- DMK
- HPH
Airports in Turkey Time
- IST
- SAW
- ESB
- YEI
- ADB
- GZT
- DIY
- ADA
- COV
- ASR
Related conversions
Common conversions
- What is 9:00 am Hanoi in Istanbul?
- 9:00 am Hanoi is 5:00 am Istanbul.
- What is 12:00 pm Hanoi in Istanbul?
- 12:00 pm Hanoi is 8:00 am Istanbul.
- What is 12:30 pm Hanoi in Istanbul?
- 12:30 pm Hanoi is 8:30 am Istanbul.
- What is 2:00 pm Hanoi in Istanbul?
- 2:00 pm Hanoi is 10:00 am Istanbul.
- What is 5:00 pm Hanoi in Istanbul?
- 5:00 pm Hanoi is 1:00 pm Istanbul.
- What is 11:30 pm Hanoi in Istanbul?
- 11:30 pm Hanoi is 7:30 pm Istanbul.