What time is it in Seoul when it's 9 AM in New York?

10:00 PM — as of 6 October 2026. Seoul is 13 hours ahead of New York.

Does the time difference between New York and Seoul change?

Yes. In 2026 it's 14 hours or 13 hours, depending on the date, because only New York changes its clocks.

What's the best time for a call between New York and Seoul?

There's no hour when both cities are in working hours (09:00–17:00). The fairest is around 07:00 in New York (20:00 in Seoul).

What time zones are New York and Seoul in?

New York uses America/New_York (UTC−4 today); Seoul uses Asia/Seoul (UTC+9 today).

Time difference between New York and Seoul

Seoul is 13 hours ahead of New York. When it's 9:00 in New York, it's 22:00 in Seoul.

From

Seoul is 13 hours ahead of New York.

On Tuesday, 6 October 2026, 09:00 in New York is 22:00 in Seoul. New York is UTC−4; Seoul is UTC+9.

The gap through 2026

1 Jan – 8 MarSeoul is 14 hours ahead of New York.
8 Mar – 1 NovSeoul is 13 hours ahead of New York.
1 Nov – 31 DecSeoul is 14 hours ahead of New York.

New York moves its clocks forward on 8 March (UTC−5 → UTC−4).
New York moves its clocks back on 1 November (UTC−4 → UTC−5).

New York to Seoul, hour by hour

On Tuesday 6 October.

New York	Seoul
07:00 Early morning	20:00 Evening
08:00 Early morning	21:00 Evening
09:00 Working hours	22:00 Sleeping hours
10:00 Working hours	23:00 Sleeping hours
11:00 Working hours	00:00+1 Sleeping hours
12:00 Working hours	01:00+1 Sleeping hours
13:00 Working hours	02:00+1 Sleeping hours
14:00 Working hours	03:00+1 Sleeping hours
15:00 Working hours	04:00+1 Sleeping hours
16:00 Working hours	05:00+1 Sleeping hours
17:00 Evening	06:00+1 Sleeping hours
18:00 Evening	07:00+1 Early morning
19:00 Evening	08:00+1 Early morning
20:00 Evening	09:00+1 Working hours
21:00 Evening	10:00+1 Working hours
22:00 Sleeping hours	11:00+1 Working hours

Daylight saving in 2026

New York moves its clocks forward on Sunday 8 March (UTC−5 → UTC−4).
New York moves its clocks back on Sunday 1 November (UTC−4 → UTC−5).

1 Jan – 8 MarSeoul is 14 hours ahead of New York.
8 Mar – 1 NovSeoul is 13 hours ahead of New York.
1 Nov – 31 DecSeoul is 14 hours ahead of New York.

Best times for a call

Working hours (09:00–17:00) in New York and Seoul don't overlap, so any call is early or late for someone.

New York 07:00Early morningSeoul 20:00Evening
New York 20:00EveningSeoul 09:00 +1Working hours
New York 21:00EveningSeoul 10:00 +1Working hours

How the time difference calculator works

The difference is each city's offset from UTC on the date you pick, subtracted. Offsets come from the IANA time zone database in your browser.

Because countries change their clocks on different dates — or not at all — the gap between two cities can change for a few weeks a year. The calculator lists every change in the year.

Examples

London is 5 hours ahead of New York for most of the year, but only 4 hours ahead for about three weeks in March and one week in late October.
Dubai doesn't change its clocks, so its gap to London is 4 hours in winter and 3 hours in summer.

Good for

Knowing when a colleague's day starts
Setting expectations for replies across time zones
Planning travel and jet lag

Frequently asked questions

What time is it in Seoul when it's 9 AM in New York?: 10:00 PM — as of 6 October 2026. Seoul is 13 hours ahead of New York.
Does the time difference between New York and Seoul change?: Yes. In 2026 it's 14 hours or 13 hours, depending on the date, because only New York changes its clocks.
What's the best time for a call between New York and Seoul?: There's no hour when both cities are in working hours (09:00–17:00). The fairest is around 07:00 in New York (20:00 in Seoul).
What time zones are New York and Seoul in?: New York uses America/New_York (UTC−4 today); Seoul uses Asia/Seoul (UTC+9 today).

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