4pm in Hawaii Time is 9am in Hanoi on the next day.

Frequently asked

Quick answers about converting between Hawaii Time and Hanoi. Can't find what you need? Email [email protected].

What is the time difference between Hawaii Time and Hanoi?

Hawaii Time is 17 hours behind Hanoi right now. We always show the live, daylight-saving-correct difference, so this figure already accounts for whichever side is observing summer time today.

When it's 4pm in Hawaii Time, what time is it in Hanoi?

4pm in Hawaii Time is 9am in Hanoi on the next day. Both sides are inside the standard 9-to-5 working day, so this is a sociable time for a call in both places. Use the hour-by-hour table above to read any other time across.

What's the best time for a call between Hawaii Time and Hanoi?

4pm–5pm in Hawaii Time lines up with 9am–10am in Hanoi the next day — both sides are inside a 9-to-5 working day.

Does this account for daylight saving time?

Yes. We track every clock change in both places, so the abbreviations you see — HST and +07:00 — are the ones actually in effect right now, not a fixed all-year value. When either side changes its clocks, this page updates automatically.

Why is the date sometimes different on each side?

When two places are far enough apart, the same moment can fall on different calendar days. That is why some conversions are marked "previous day" or "next day" — it is the same instant in time, read off two clocks that crossed midnight at different points.