Waipahu SeoulTime Converter
Waipahu (HST, UTC−10) is currently 19 hours behind Seoul (KST, UTC+9). Compare live clocks, convert any hour, and find times to meet.
Quick answer
When it's in Waipahu, it's the next day in Seoul.
Waipahu (HST) runs 19 hours behind Seoul (KST). Both sides keep standard office hours with a real 9–6 overlap — the highlighted window below works for everyone.
- Time difference
- +19h 00m
- Waipahu
- UTC−10
- Seoul
- UTC+9
- Best call window
- 2:00 PM HST
Waipahu to Seoul conversion table
The next 12 hours in Waipahu and the matching local time in Seoul. The current hour is highlighted; drag the converter's slider and the table follows.
| Waipahu · HST | Seoul · KST |
|---|---|
| NOW Sat, Jul 25 |
Sun, Jul 26 |
Sat, Jul 25 |
Sun, Jul 26 |
Sat, Jul 25 |
Sun, Jul 26 |
Sat, Jul 25 |
Sun, Jul 26 |
Sat, Jul 25 |
Sun, Jul 26 |
Sat, Jul 25 |
Sun, Jul 26 |
Sat, Jul 25 |
Sun, Jul 26 |
Sat, Jul 25 |
Sun, Jul 26 |
Sat, Jul 25 |
Sun, Jul 26 |
Sat, Jul 25 |
Sun, Jul 26 |
Sun, Jul 26 |
Sun, Jul 26 |
Sun, Jul 26 |
Sun, Jul 26 |
Best time to meet between Waipahu & Seoul
Working hours are 9am–6pm in each city. The bright band is where they overlap: both sides at their desks.
This time difference never changes
Neither side observes daylight saving against the other, so the gap stays constant all year. Waipahu does not observe daylight saving time. Seoul does not observe daylight saving time. This page always shows the live, DST-aware difference.
Related time zone conversions
Jump straight to another pair: every combination is a live tool, not an article.
From Waipahu
To Seoul
One source of truth, for you and your AI
This page exposes the same answer as structured data, so when you ask an assistant "what's 9am Waipahu time in Seoul?", it can cite the exact, DST-aware result, not a stale blog post.
- Schema.org JSON-LD on every converter page
- A machine-readable facts island with time zone identifiers and every possible offset
- Live times in <time datetime> elements with explicit UTC offsets
{
"pair": "Waipahu → Seoul",
"url": "https://worldclock.pro/en/convert/waipahu-to-seoul",
"from": {
"name": "Waipahu",
"type": "city",
"abbreviation": "HST",
"daylightAbbreviation": null,
"iana": "Pacific/Honolulu",
"standardUtcOffset": "-10:00",
"daylightUtcOffset": null,
"referenceCity": "Waipahu"
},
"to": {
"name": "Seoul",
"type": "city",
"abbreviation": "KST",
"daylightAbbreviation": null,
"iana": "Asia/Seoul",
"standardUtcOffset": "+09:00",
"daylightUtcOffset": null,
"referenceCity": "Seoul"
},
"currentDifferenceMinutes": 1140,
"possibleDifferencesMinutes": [
1140
],
"note": "The difference is constant year-round."
}
Frequently asked questions
What is the time difference between Waipahu and Seoul?
Waipahu is currently 19 hours behind Seoul. Waipahu is on HST (UTC−10) and Seoul is on KST (UTC+9). The difference can change when either side starts or ends daylight saving time.
Is Seoul ahead of or behind Waipahu?
Seoul is currently 19 hours ahead of Waipahu.
When it is 9:00 AM in Waipahu, what time is it in Seoul?
When it is 9:00 AM on a Saturday in Waipahu, it is 4:00 AM the next day in Seoul.
Do Waipahu and Seoul observe daylight saving time?
Waipahu does not observe daylight saving time. Seoul does not observe daylight saving time.
How do I convert Waipahu time to Seoul time?
Add 19 hours to any time in Waipahu to get the time in Seoul. This page's converter and 24-hour table do it automatically and stay correct through daylight-saving changes.
More world clock & time zone apps
From the team behind worldclock.pro: global scheduling on iPhone & iPad, a Mac menu-bar clock, and precision Zulu/UTC for aviation, military, and HAM radio.
World Clock Master
Global time zone scheduling for international teams, travelers, and professionals who coordinate across cities and continents.
View app
World Clock Pro
The same powerful time zone converter, meeting scheduler, and world clock, living in your Mac's menu bar.
View app