Seoul, South Korea Honolulu, United States
Compare time between Seoul and Honolulu
Frequently Asked Questions
Seoul is in the KST timezone (UTC+9) and Honolulu is in the HST timezone (UTC-10). The time difference between them is 19 hours.
Use the timeline above to find overlapping business hours between Seoul and Honolulu. The "Best time to meet" card highlights the window where both cities are within working hours (9 AM – 6 PM local time).
Neither Seoul nor Honolulu observes Daylight Saving Time, so the time difference remains constant throughout the year.
Click the pencil icon next to the Seoul clock and type any time. The Honolulu clock will update instantly, showing the exact corresponding time. You can also pick a date to account for DST changes.