When the world meets at work.
Read the day in both zones.
Crossing the border. Money, language, plugs.
Money changes hands at the border: Hong Kong uses the HKD ($) and Hanoi uses the VND (₫). Language shifts too — English in Hong Kong, Vietnamese in Hanoi. Be careful behind the wheel: Hong Kong drives on the left, Hanoi on the right.
- Country
- Hong Kong
- Capital
- City of Victoria
- Currency
- Hong Kong dollar (HKD · $)
- Language
- English, Chinese
- Calling code
- +852
- Drives on
- Left
- Country
- Vietnam
- Capital
- Hanoi
- Currency
- Vietnamese đồng (VND · ₫)
- Language
- Vietnamese
- Calling code
- +84
- Drives on
- Right
Quick answers. Before you book the call.
What's the time difference between Hong Kong and Hanoi?
Hong Kong is 1 hour behind Hanoi. Hong Kong runs on GMT+8 and Hanoi on GMT+7. The gap can shift by an hour when either side enters or leaves daylight saving — the live clocks above always reflect the current offset.
When's the best time to schedule a meeting?
There are 7 hours where both cities are inside a 09:00–17:00 workday. Aim for the middle of that window so neither side is starting or closing out.
Does daylight saving time change the difference?
Yes, if either city observes DST. When one side shifts and the other doesn't, the gap changes by one hour. The DST badges under each clock show whether each zone is currently shifted and when the next transition lands.
How far is Hong Kong from Hanoi?
About 871 km as the crow flies (great-circle distance). A non-stop commercial flight cruises that in roughly 1h 31m, not counting airport time, winds, or routing around restricted airspace.
Can I send this meeting time as a calendar invite?
Yes. Pick a time on the slider above, open the meeting card, customize the title and duration, then download the .ics file. It imports cleanly into Google Calendar, Outlook, and Apple Calendar with the correct timezone attached.
What currency do Hong Kong and Hanoi use?
Hong Kong uses the Hong Kong dollar (HKD, $); Hanoi uses the Vietnamese đồng (VND, ₫). Check the live rate before transferring money or paying with a card abroad — most banks add a 1–3 % FX margin on top of the mid-market rate.
How do I call Hong Kong from Hanoi?
Dial the international prefix used by your carrier (often 00), then +852, then the local number — drop any leading zero of the city or mobile code. For free calls, WhatsApp, Signal, and FaceTime work over Wi-Fi regardless of country code.
What language is spoken in Hong Kong and Hanoi?
Hong Kong primarily speaks English, Chinese; Hanoi speaks Vietnamese. English is widely used in business contexts in major cities of both, but written contracts may need translation.
Do Hong Kong and Hanoi drive on the same side of the road?
No. Hong Kong drives on the left, Vietnam on the right. If you're renting, expect a learning curve on the first day — especially at roundabouts and when judging the centre of the lane.