Thornton SeoulTime Converter
Thornton (MDT, UTC−6) is currently 15 hours behind Seoul (KST, UTC+9). Compare live clocks, convert any hour, and find times to meet.
Quick answer
When it's in Thornton, it's the next day in Seoul.
Thornton (MST/MDT) runs 15 hours behind Seoul (KST). A 9-to-5 workday on one side lands in the other side's evening or night, so the two cities share almost no normal working hours — edge-of-day calls are the trick.
- Time difference
- +15h 00m
- Thornton
- UTC−6
- Seoul
- UTC+9
- Best call window
- Outside 9–6
Thornton to Seoul conversion table
The next 12 hours in Thornton and the matching local time in Seoul. The current hour is highlighted; drag the converter's slider and the table follows.
| Thornton · MDT | Seoul · KST |
|---|---|
| NOW Sun, Jul 26 |
Sun, Jul 26 |
Sun, Jul 26 |
Sun, Jul 26 |
Sun, Jul 26 |
Sun, Jul 26 |
Sun, Jul 26 |
Sun, Jul 26 |
Sun, Jul 26 |
Sun, Jul 26 |
Sun, Jul 26 |
Sun, Jul 26 |
Sun, Jul 26 |
Sun, Jul 26 |
Sun, Jul 26 |
Mon, Jul 27 |
Sun, Jul 26 |
Mon, Jul 27 |
Sun, Jul 26 |
Mon, Jul 27 |
Sun, Jul 26 |
Mon, Jul 27 |
Sun, Jul 26 |
Mon, Jul 27 |
Best time to meet between Thornton & Seoul
Working hours are 9am–6pm in each city. The bright band is where they overlap: both sides at their desks.
Daylight saving shifts this gap by up to 1 hour
The difference between Thornton and Seoul swings between 15 and 16 hours across the year as each side starts or ends daylight saving. Clocks in Thornton move back 1 hour to MST (UTC−7) on Sunday, November 1, 2026. 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 Thornton
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 Thornton 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": "Thornton → Seoul",
"url": "https://worldclock.pro/en/convert/thornton-to-seoul",
"from": {
"name": "Thornton",
"type": "city",
"abbreviation": "MST",
"daylightAbbreviation": "MDT",
"iana": "America/Denver",
"standardUtcOffset": "-07:00",
"daylightUtcOffset": "-06:00",
"referenceCity": "Thornton"
},
"to": {
"name": "Seoul",
"type": "city",
"abbreviation": "KST",
"daylightAbbreviation": null,
"iana": "Asia/Seoul",
"standardUtcOffset": "+09:00",
"daylightUtcOffset": null,
"referenceCity": "Seoul"
},
"currentDifferenceMinutes": 900,
"possibleDifferencesMinutes": [
900,
960
],
"note": "Between the regions that use these zones the difference is 15 and 16 hours across the year, depending on daylight saving on each side. The clocks on this page show the named zones themselves, which are fixed."
}
Frequently asked questions
What is the time difference between Thornton and Seoul?
Thornton is currently 15 hours behind Seoul. Thornton is on MDT (UTC−6) 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 Thornton?
Seoul is currently 15 hours ahead of Thornton.
When it is 9:00 AM in Thornton, what time is it in Seoul?
When it is 9:00 AM on a Sunday in Thornton, it is 12:00 AM the next day in Seoul.
Do Thornton and Seoul observe daylight saving time?
Clocks in Thornton move back 1 hour to MST (UTC−7) on Sunday, November 1, 2026. Seoul does not observe daylight saving time.
How do I convert Thornton time to Seoul time?
Add 15 hours to any time in Thornton to get the time in Seoul. This page's converter and 24-hour table do it automatically and stay correct through daylight-saving changes.
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