KST to HST time converter
Hawaii Time (HST) is 19 hours behind Korea Standard Time (KST) all year round. Use the grid below to line up Seoul and Honolulu: 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 18:43 KST in Seoul and 23:43 HST in Honolulu.
Tue, Oct 20
Seoul home
18:43
Tue, Oct 20 · UTC+9
Honolulu
23:43 -1
Mon, Oct 19 · UTC-10
2/10 zones · drag the tape, scroll sideways or use the arrow keys; Home jumps back to now.
KST to HST: frequently asked
What is the time difference between KST and HST?
Hawaii Time (HST) is 19 hours behind Korea Standard Time (KST) all year round.
What time is 9 AM KST in HST?
9:00 AM KST is 2:00 PM HST the previous day.
When do working hours overlap between Seoul and Honolulu?
Standard 9:00 AM–5:00 PM working hours never overlap. The closest fit is 4:00 AM KST, which is 9:00 AM HST.