Hawaii Time is 19 hours behind Seoul.

Frequently asked

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

What is the time difference between Hawaii Time and Seoul?

Hawaii Time is 19 hours behind Seoul 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 9am in Hawaii Time, what time is it in Seoul?

9am in Hawaii Time is 4am in Seoul on the next day. Use the hour-by-hour table above to read any other time across — find the row and read the matching cell in the other column.

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

2pm–5pm in Hawaii Time lines up with 9am–12pm in Seoul 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 KST — 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.