Time difference
Honolulu to Seoul Time Difference
Seoul is 19 hours ahead of Honolulu — when it's 12:00 PM in Honolulu, it's 7:00 AM the next day in Seoul. (Honolulu (Pacific/Honolulu, HST); Seoul (Asia/Seoul, KST).) Below: live local times, the best hours for a call, a full conversion table, and exact daylight-saving dates.
Seoul is 19 hours ahead of Honolulu. The best window for a call is 2 PM–5 PM in Honolulu, which is 9 AM–12 PM in Seoul — a 3-hour overlap inside 9 AM–5 PM on both sides. Honolulu and Seoul change their clocks together (or don't change at all), so the time difference between them stays the same all year.
- When it's 9:00 AM in Honolulu, it's 4:00 AM the next day in Seoul.
- When it's 9:00 AM in Seoul, it's 2:00 PM the previous day in Honolulu.
Seoul is currently 19 hours ahead of Honolulu.
Interactive converter
12:00PM
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Best times to meet
The 9 AM – 5 PM business windows in Honolulu and Seoul overlap for 3 hours. 2 PM–5 PM in Honolulu is 9 AM–12 PM in Seoul. Aim somewhere in the middle of that window so neither side starts cold or finishes drained.
Quick conversion table
| Honolulu | Seoul |
|---|---|
| 12 AM | 7:00 PM |
| 1 AM | 8:00 PM |
| 2 AM | 9:00 PM |
| 3 AM | 10:00 PM |
| 4 AM | 11:00 PM |
| 5 AM | 12:00 AM (next day) |
| 6 AM | 1:00 AM (next day) |
| 7 AM | 2:00 AM (next day) |
| 8 AM | 3:00 AM (next day) |
| 9 AM | 4:00 AM (next day) |
| 10 AM | 5:00 AM (next day) |
| 11 AM | 6:00 AM (next day) |
| 12 PM | 7:00 AM (next day) |
| 1 PM | 8:00 AM (next day) |
| 2 PM | 9:00 AM (next day) |
| 3 PM | 10:00 AM (next day) |
| 4 PM | 11:00 AM (next day) |
| 5 PM | 12:00 PM (next day) |
| 6 PM | 1:00 PM (next day) |
| 7 PM | 2:00 PM (next day) |
| 8 PM | 3:00 PM (next day) |
| 9 PM | 4:00 PM (next day) |
| 10 PM | 5:00 PM (next day) |
| 11 PM | 6:00 PM (next day) |
Daylight saving
The time difference between these two cities stays the same over the next twelve months — neither zone is changing for daylight saving in that window.
- Honolulu does not observe daylight saving time.
- Seoul does not observe daylight saving time.
Frequently asked questions
- Is Seoul ahead of or behind Honolulu?
- Seoul is 19 hours ahead of Honolulu.
- How many hours ahead of Honolulu is Seoul?
- Seoul is 19 hours ahead of Honolulu.
- What time is 9 AM in Honolulu in Seoul?
- 9:00 AM in Honolulu is 4:00 AM the next day in Seoul.
- What time is noon in Honolulu in Seoul?
- 12:00 PM in Honolulu is 7:00 AM the next day in Seoul.
- What time is 5 PM in Honolulu in Seoul?
- 5:00 PM in Honolulu is 12:00 PM the next day in Seoul. Useful for end-of-day handoffs between the two offices.
- What time is 3 PM in Honolulu in Seoul?
- 3:00 PM in Honolulu is 10:00 AM the next day in Seoul.
- Is Honolulu currently observing daylight saving time?
- Honolulu does not observe daylight saving time — its UTC offset stays the same all year.
- Is Seoul currently observing daylight saving time?
- Seoul does not observe daylight saving time — its UTC offset stays the same all year.
- Do Honolulu and Seoul observe daylight saving?
- The time difference between these two cities stays the same over the next twelve months — neither zone is changing for daylight saving in that window.
- When is the best time to call Seoul from Honolulu?
- Aim for 2 PM–5 PM in Honolulu, which is 9 AM–12 PM in Seoul.
- When is the best time to call Honolulu from Seoul?
- Aim for 9 AM–12 PM in Seoul, which is 2 PM–5 PM in Honolulu.
- Honolulu (HST) to Seoul (KST) — how do I convert quickly?
- Add 19 hours to Honolulu local time to get Seoul local time. Or use the converter at the top of this page — it stays accurate through daylight-saving changes automatically.
Other conversions
- Honolulu to New York
- Honolulu to London
- Honolulu to Tokyo
- Dubai to Honolulu
- Honolulu to Singapore
- Honolulu to Los Angeles
- Honolulu to Sydney
- Honolulu to Paris
- Honolulu to Mumbai
- Hong Kong to Honolulu