Does Seoul observe daylight saving time?

No. Seoul stays on KST (UTC+9) all year, so its clocks don't change.

Does Washington DC observe daylight saving time?

Yes. Washington DC is on EDT (UTC-4) now, and its clocks go back 1 hour on Sun, Nov 1, to EST (UTC-5).

What time is it in Washington DC when it's 9 AM in Seoul?

8:00 PM in Washington DC, the day before (Sat, Oct 17, when it's Sun, Oct 18 in Seoul).

Seoul to Washington DC Meeting Planner

Washington DC is 13 hours behind Seoul right now. Their working days don't overlap today.

Seoul · South Korea

4:04 AM

Sun, Oct 18 · KST

Washington DC · United States

3:04 PM

Sat, Oct 17 · EDT · summer time

Best Meeting Times Between Seoul and Washington DC

No time falls inside working hours (9 AM to 5 PM) in both cities. The closest is 11:00 AM in Seoul, which is 10:00 PM in Washington DC; consider splitting into two shorter meetings or shifting someone's hours.

Who's meeting

2 of 4 places

SeoulOrganizerSouth Korea ·4:04AMnow
Washington DCUnited States ·· summer time3:04PMYesterday · now

Add a city

Add up to 4 places by city, country, time zone or abbreviation, like Tokyo, India or JST. Press "/" to jump here.

Date in Seoul

Working hours, everywhere

Best times to meet

Sunday, October 18, 2026, in Seoul time.

11:00AMBest · PossibleWorking hours in Seoul (11:00); late evening in Washington DC (22:00, previous day).
10:00AMOption 2 · PossibleWorking hours in Seoul (10:00); late evening in Washington DC (21:00, previous day).
9:00AMOption 3 · PossibleWorking hours in Seoul (09:00); late evening in Washington DC (20:00, previous day).

The whole day

Pick any slot in the Fit row, or use the arrow keys there, to make it the meeting time.

Each column is a one-hour slot of the first place's day. The Fit row grades how well the slot suits everyone; each row shows the local time and whether it's working hours there.
Fit
SeoulUTC+9
Washington DCEDT
UTC	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14

Working hours (09–17)Just outside (07–09, 17–20)Late evening (20–23)NightFit: optimal, good, possible, poor

Your meeting

Seoul11:00 AM UTC+9Sun, Oct 18
Washington DC10:00 PM EDTSat, Oct 17
UTC2026-10-18 02:00 UTC

What will it cost? Try the meeting cost calculator.

Time difference between Seoul and Washington DC

Washington DC is 13 hours behind Seoul right now: Washington DC is on EDT (UTC-4) and Seoul on KST (UTC+9). That changes on Sun, Nov 1, when clocks go back in Washington DC: then Washington DC is 14 hours behind Seoul.

Time difference between Seoul and Washington DC over the next 12 months
From	Difference	Why
Now	Washington DC 13 hours behind	—
Sun, Nov 1	Washington DC 14 hours behind	Clocks go back in Washington DC
Sun, Mar 14, 2027	Washington DC 13 hours behind	Clocks go forward in Washington DC

Seoul is on Korean Standard Time. Washington DC is on Eastern Standard Time.

Frequently Asked Questions: Seoul & Washington DC Scheduling

What is the time difference between Seoul and Washington DC?: Washington DC is 13 hours behind Seoul right now: Washington DC is on EDT (UTC-4) and Seoul on KST (UTC+9). That changes on Sun, Nov 1, when clocks go back in Washington DC: then Washington DC is 14 hours behind Seoul.
What is the best time to schedule a meeting between Seoul and Washington DC?: No time falls inside working hours (9 AM to 5 PM) in both cities. The closest is 11:00 AM in Seoul, which is 10:00 PM in Washington DC; consider splitting into two shorter meetings or shifting someone's hours.
Does Seoul observe daylight saving time?: No. Seoul stays on KST (UTC+9) all year, so its clocks don't change.
Does Washington DC observe daylight saving time?: Yes. Washington DC is on EDT (UTC-4) now, and its clocks go back 1 hour on Sun, Nov 1, to EST (UTC-5).
What time is it in Washington DC when it's 9 AM in Seoul?: 8:00 PM in Washington DC, the day before (Sat, Oct 17, when it's Sun, Oct 18 in Seoul).

Or see every city pair, or plan with more places in the meeting planner.