Korea Standard Time (kst) is used in South Korea. The IANA timezone identifier is Asia/Seoul.

Eastern Standard Time (est) is used in USA. The IANA timezone identifier is America/New_York.

KST to EST Time Converter

Korea Standard Time → Eastern Standard Time

KST = UTC+9EST = UTC-4

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

EST (New York)

USA · -13h🔔 Public Holiday in 2d — Juneteenth National Independence Day

20:00-1 day

London

United Kingdom · -8h

01:00

Tokyo

Japan · UTC±0

09:00

Dubai

United Arab Emirates · -5h

04:00

Sydney

Australia · +1h

10:00

KST (Seoul) ↔ EST (New York) — time offset

KST (Seoul) is 13 hours ahead of EST (New York). Midday in KST (Seoul) lines up with 23:00 in EST (New York).

KST (Seoul) is in the Asia/Seoul timezone. EST (New York) is in America/New_York. The difference is 13 hours.

Mutual working hours

KST (Seoul) and EST (New York) have no shared working hours under a standard 9:00–17:00 schedule. One side will always need to join at an off-hour.

When to schedule across time zones

Since KST (Seoul) and EST (New York) don't share working hours, these are the most practical options available.

05:00 Seoul / 16:00 New York⚡ One side off-hours

⚠️ 4h before working hours in Seoul

09:00 Seoul / 20:00 New York⚡ One side off-hours

⚠️ 4h after working hours in New York

04:00 Seoul / 15:00 New York⚡ One side off-hours

⚠️ 5h before working hours in Seoul

Based on standard 09:00–17:00 working hours in each location's local time.

Upcoming public holidays

⚡ Watch out — upcoming holidays on both sides. Verify availability in advance.

KST (Seoul)7 holidays

Aug 15Liberation Day

Sep 24Chuseok

Sep 25Chuseok

Sep 26Chuseok

Oct 3National Foundation Day

EST (New York)8 holidays

Jun 19Juneteenth National Independence DaySOON

Jul 3Independence Day

Sep 7Labour Day

Oct 12Columbus Day

Oct 12Indigenous Peoples' Day

How to work with KST (Seoul) and EST (New York) time zones

KST (Seoul) (South Korea) and EST (New York) (USA) are 13 hours apart — far enough that standard 9–5 schedules do not overlap. Any real-time meeting means someone is joining outside their normal hours.

💡 How to schedule across these time zones

⚡

When KST (Seoul) is at 05:00, EST (New York) reads 16:00 — 4h before working hours in Seoul.

⚡

When KST (Seoul) is at 09:00, EST (New York) reads 20:00 — 4h after working hours in New York.

⚡

When KST (Seoul) is at 04:00, EST (New York) reads 15:00 — 5h before working hours in Seoul.

Since there is no natural overlap, the options above represent the most balanced compromise, minimizing out-of-hours inconvenience for both sides.

DST transitions can silently shift your meeting times by an hour. The ClockinSync Chrome Extension tracks these changes automatically so you never get caught off guard.

Get the Extension — Free →

Use the time slider above to find the exact equivalent time for any moment in KST (Seoul). The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.

KST (Seoul) ↔ EST (New York)

No overlap — one side will join outside working hours

KST (Seoul)

EST (New York)