Live offset · Year-round DST · Shareable URL

Time difference
Seoul and Boston

Live clocks (KST ↔ EST), the current gap, month-by-month offset changes, and a full 24-hour map from Seoul to Boston.

1

Live gap

See the current offset between Seoul and Boston, with IANA-backed clocks updating every second.

2

Year-round chart

DST can shift the gap by an hour twice a year—the 2026 month table shows every change.

3

Hour-by-hour

Scroll the 24-hour table to map any civil hour in Seoul into Boston with day-shift cues.

Time difference workspace

How Seoul and Boston line up today.

2 cities · live offsetGap shifts yearly
City pair

Seoul Boston

Boston is 13h behind Seoul at this moment. Compare live clocks, seasonal DST shifts, and hour-by-hour conversions below.

Live offsetIANA zones · updates automatically
Seoul
Asia/Seoul
ZoneKST
Offset nowUTC+9
Hour gap
−13h

BostonSeoul

Boston
America/New_York
ZoneEST / EDT
Offset nowUTC-4
About this pairUseful when planning calls or docs

Time difference between Seoul and Boston: Boston is currently 14 hours behind Seoul.

This difference is not constant: in winter Seoul is 14 hours ahead of Boston, while in summer (when one or both observe DST) the gap shifts to 13 hours ahead of. The monthly table below shows the exact offset gap month by month. For practical scheduling, jump to the best-time-to-meet page or the 24-hour conversion table below.

Jump aheadPick the view you need next
Best time to meetMonthly offsets24-hour table
Live clocks workspace

Clocks side by side.

Updates every second
Right nowAsia/Seoul · America/New_York
Seoul
Asia/Seoul
Live time
--:--
OffsetUTC+9
AbbreviationKST
No DST
Boston
America/New_York
Live time
--:--
OffsetUTC-4
AbbreviationEST / EDT
Observes DST
Relationship

Boston is 13h behind Seoul.

DST rules can widen or shrink this gap for a few weeks each spring and autumn—the month table below shows how many hours Boston sits ahead of or behind Seoul through the calendar year.

Next stepsPlan overlap or convert zones
Best time to meet →KST → EST →Overlap Finder →
Year-round

Offset changes by month

Sampled mid-month for 2026. Compares Boston versus Seoul; a value of +3h means Boston is three hours ahead of Seoul.

2026 calendar

Month-by-month gap

MonthDifference (Boston vs Seoul)
January-14h
February-14h
March-13h
April-13h
May-13h
June-13h
July-13h
August-13h
September-13h
October-13h
November-14h
December-14h
Hour by hour

24-hour conversion table

Every civil hour in Seoul mapped into Boston; day-shift cues follow active DST for both zones today.

SeoulBoston

Hourly wall-clock map for today — midnight crossings show as day shifts.

Seoul with part-of-day icon
Boston arrow and converted time
Day
  • 00:00
    11:00
    Prev day
  • 01:00
    12:00
    Prev day
  • 02:00
    13:00
    Prev day
  • 03:00
    14:00
    Prev day
  • 04:00
    15:00
    Prev day
  • 05:00
    16:00
    Prev day
  • 06:00
    17:00
    Prev day
  • 07:00
    18:00
    Prev day
  • 08:00
    19:00
    Prev day
  • 09:00
    20:00
    Prev day
  • 10:00
    21:00
    Prev day
  • 11:00
    22:00
    Prev day
  • 12:00
    23:00
    Prev day
  • 13:00
    00:00
    Same day
  • 14:00
    01:00
    Same day
  • 15:00
    02:00
    Same day
  • 16:00
    03:00
    Same day
  • 17:00
    04:00
    Same day
  • 18:00
    05:00
    Same day
  • 19:00
    06:00
    Same day
  • 20:00
    07:00
    Same day
  • 21:00
    08:00
    Same day
  • 22:00
    09:00
    Same day
  • 23:00
    10:00
    Same day
Uses your browser's IANA zone data — choose another date in the converter for historical or future days.
Keep exploring

Related pages

More time-difference routes, pairwise best times, triple-city overlaps, and conversions tied to Seoul, Boston, or this corridor.

FAQ

Frequently asked questions

Offsets between Seoul and Boston, DST shifts, scheduling, and how we source timezone data—plus how to share this page.

Currently, Boston is 13h behind Seoul. This may change through the year if either city observes Daylight Saving Time.