HST to KST time converter
Korea Standard Time (KST) is 19 hours ahead of Hawaii Time (HST) all year round. Use the grid below to line up Honolulu and Seoul: drag the cursor across the day, and working hours (9 AM–5 PM) are highlighted in every row so you can spot a slot that suits both sides.
Right now it is 23:43 HST in Honolulu and 18:43 KST in Seoul.
Mon, Oct 19
Honolulu home
23:43
Mon, Oct 19 · UTC-10
Seoul
18:43 +1
Tue, Oct 20 · UTC+9
2/10 zones · drag the tape, scroll sideways or use the arrow keys; Home jumps back to now.
HST to KST: frequently asked
What is the time difference between HST and KST?
Korea Standard Time (KST) is 19 hours ahead of Hawaii Time (HST) all year round.
What time is 9 AM HST in KST?
9:00 AM HST is 4:00 AM KST the next day.
When do working hours overlap between Honolulu and Seoul?
Standard 9:00 AM–5:00 PM working hours never overlap. The closest fit is 10:00 PM HST, which is 5:00 PM KST.