Seoul PhiladelphiaTime Converter
Seoul (KST, UTC+9) is currently 13 hours ahead of Philadelphia (EDT, UTC−4). Compare live clocks, convert any hour, and find times to meet.
Quick answer
When it's in Seoul, it's the previous day in Philadelphia.
Seoul (KST) runs 13 hours ahead of Philadelphia (EST/EDT). 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
- −13h 00m
- Seoul
- UTC+9
- Philadelphia
- UTC−4
- Best call window
- Outside 9–6
Seoul to Philadelphia conversion table
The next 12 hours in Seoul and the matching local time in Philadelphia. The current hour is highlighted; drag the converter's slider and the table follows.
| Seoul · KST | Philadelphia · EDT |
|---|---|
| NOW Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Best time to meet between Seoul & Philadelphia
Working hours are 9am–6pm in each city. The bright band is where they overlap — when both sides are at their desks.
Daylight saving shifts this gap by up to 1 hour
The difference between Seoul and Philadelphia swings between 14 and 13 hours across the year as each side starts or ends daylight saving. Seoul does not observe daylight saving time. Clocks in Philadelphia move back 1 hour to EST (UTC−5) on Sunday, November 1, 2026. 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 Seoul
To Philadelphia
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 Seoul time in Philadelphia?", 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 IANA zones and every possible offset
- Live times in <time datetime> elements with explicit UTC offsets
{
"pair": "Seoul → Philadelphia",
"url": "https://worldclock.pro/en/convert/seoul-to-philadelphia",
"from": {
"name": "Seoul",
"type": "city",
"abbreviation": "KST",
"daylightAbbreviation": null,
"iana": "Asia/Seoul",
"standardUtcOffset": "+09:00",
"daylightUtcOffset": null,
"referenceCity": "Seoul"
},
"to": {
"name": "Philadelphia",
"type": "city",
"abbreviation": "EST",
"daylightAbbreviation": "EDT",
"iana": "America/New_York",
"standardUtcOffset": "-05:00",
"daylightUtcOffset": "-04:00",
"referenceCity": "Philadelphia"
},
"currentDifferenceMinutes": -780,
"possibleDifferencesMinutes": [
-840,
-780
],
"note": "Between the regions that use these zones the difference is 14 and 13 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 Seoul and Philadelphia?
Seoul is currently 13 hours ahead of Philadelphia. Seoul is on KST (UTC+9) and Philadelphia is on EDT (UTC−4). The difference can change when either side starts or ends daylight saving time.
Is Philadelphia ahead of or behind Seoul?
Philadelphia is currently 13 hours behind Seoul.
When it is 9:00 AM in Seoul, what time is it in Philadelphia?
When it is 9:00 AM on a Monday in Seoul, it is 8:00 PM the previous day in Philadelphia.
Do Seoul and Philadelphia observe daylight saving time?
Seoul does not observe daylight saving time. Clocks in Philadelphia move back 1 hour to EST (UTC−5) on Sunday, November 1, 2026.
How do I convert Seoul time to Philadelphia time?
Subtract 13 hours from any time in Seoul to get the time in Philadelphia. This page's converter and 24-hour table do it automatically and stay correct through daylight-saving changes.
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