Time difference between Seoul and Honolulu
Honolulu is 19 hours behind Seoul
Seoul, South Korea is UTC+9 · Honolulu, the United States is UTC−10 — on standard time
The gap holds all year
Neither city changes its clocks — Seoul does not change its clocks and Honolulu does not change its clocks — so 19 hours is the difference in January and in July alike. That is worth knowing about this pair specifically, because most international pairs do move and a recurring meeting between them does not need checking twice a year.
When they can both be at their desks
Nine-to-five in Seoul and nine-to-five in Honolulu do not overlap at all. With 19 hours between them, one side is always outside working hours, and the practical question is which side takes the early start or the late finish rather than when to meet.
Seoul to Honolulu, hour by hour
| Seoul | Honolulu |
|---|---|
| 12:00 AM | 5:00 AM (previous day) |
| 1:00 AM | 6:00 AM (previous day) |
| 2:00 AM | 7:00 AM (previous day) |
| 3:00 AM | 8:00 AM (previous day) |
| 4:00 AM | 9:00 AM (previous day) |
| 5:00 AM | 10:00 AM (previous day) |
| 6:00 AM | 11:00 AM (previous day) |
| 7:00 AM | 12:00 PM (previous day) |
| 8:00 AM | 1:00 PM (previous day) |
| 9:00 AM | 2:00 PM (previous day) |
| 10:00 AM | 3:00 PM (previous day) |
| 11:00 AM | 4:00 PM (previous day) |
| 12:00 PM | 5:00 PM (previous day) |
| 1:00 PM | 6:00 PM (previous day) |
| 2:00 PM | 7:00 PM (previous day) |
| 3:00 PM | 8:00 PM (previous day) |
| 4:00 PM | 9:00 PM (previous day) |
| 5:00 PM | 10:00 PM (previous day) |
| 6:00 PM | 11:00 PM (previous day) |
| 7:00 PM | 12:00 AM |
| 8:00 PM | 1:00 AM |
| 9:00 PM | 2:00 AM |
| 10:00 PM | 3:00 AM |
| 11:00 PM | 4:00 AM |
On the usual gap of 19 hours.
Frequently asked questions
What is the time difference between Seoul and Honolulu?
Honolulu is 19 hours behind Seoul for most of the year. The gap never changes: Seoul does not change its clocks and Honolulu does not change its clocks.
Is Honolulu ahead of Seoul?
No — Honolulu is 19 hours behind. Seoul is UTC+9 and Honolulu is UTC−10 on standard time.
What time is 9 AM in Seoul in Honolulu?
2:00 PM (previous day), on the usual gap.
When can Seoul and Honolulu meet?
Nine-to-five in Seoul and nine-to-five in Honolulu do not overlap at all. One side has to take the call outside working hours, and with 19 hours between them it is worth deciding in advance which side that is.
Other pairs
- Seoul to São Paulo
- Seoul to Buenos Aires
- Seoul to Lima
- Seoul to Lagos
- Seoul to Johannesburg
- Seoul to Nairobi
- Brisbane to London
- Brisbane to Dublin
- Brisbane to Lisbon
- Brisbane to Paris
Every Seoul pair · Every Honolulu pair · All city pairs · Time zones by abbreviation