Does Boston observe daylight saving time?

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

Does Seoul observe daylight saving time?

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

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

10:00 PM in Seoul, on the same day.

Boston to Seoul Meeting Planner

Seoul is 13 hours ahead of Boston right now. Their working days don't overlap today.

Boston · United States

4:48 PM

Sat, Oct 17 · EDT · summer time

Seoul · South Korea

5:48 AM

Sun, Oct 18 · KST

Best Meeting Times Between Boston and Seoul

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

Who's meeting

2 of 4 places

BostonOrganizerUnited States ·· summer time4:48PMnow
SeoulSouth Korea ·5:48AMTomorrow · 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 Boston

Working hours, everywhere

Best times to meet

Saturday, October 17, 2026, in Boston time.

9:00AMBest · PossibleWorking hours in Boston (09:00); late evening in Seoul (22:00).
8:00PMOption 2 · PossibleWorking hours in Seoul (09:00, next day); late evening in Boston (20:00).
9:00PMOption 3 · PossibleWorking hours in Seoul (10:00, next day); late evening in Boston (21:00).

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
BostonEDT
SeoulUTC+9
UTC	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03

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

Your meeting

Boston9:00 AM EDTSat, Oct 17
Seoul10:00 PM UTC+9Sat, Oct 17
UTC2026-10-17 13:00 UTC

What will it cost? Try the meeting cost calculator.

Time difference between Boston and Seoul

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

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

Boston is on Eastern Standard Time. Seoul is on Korean Standard Time.

Frequently Asked Questions: Boston & Seoul Scheduling

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

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