Time difference
Boston to Seoul Time Difference
Seoul is 13 hours ahead of Boston — when it's 12:00 PM in Boston, it's 1:00 AM the next day in Seoul. (Boston (America/New_York, EDT); Seoul (Asia/Seoul, KST).) Below: live local times, the best hours for a call, a full conversion table, and exact daylight-saving dates.
Seoul is 13 hours ahead of Boston. Standard 9 AM–5 PM business hours in Boston and Seoul do not overlap, so a live call needs one side outside normal hours. Clocks change on November 1, 2026, which briefly shifts the gap between Boston and Seoul — the converter on this page always reflects the correct offset for the date you pick.
- When it's 9:00 AM in Boston, it's 10:00 PM in Seoul.
- When it's 9:00 AM in Seoul, it's 8:00 PM the previous day in Boston.
Seoul is currently 13 hours ahead of Boston.
Interactive converter
12:00PM
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Best times to meet
Standard 9 AM – 5 PM hours in Boston and Seoul do not overlap. The least-bad options are an early start in one city or a late evening call in the other — for example a 7–8 AM meeting in Boston, or a 6–8 PM meeting in Seoul.
Quick conversion table
| Boston | Seoul |
|---|---|
| 12 AM | 1:00 PM |
| 1 AM | 2:00 PM |
| 2 AM | 3:00 PM |
| 3 AM | 4:00 PM |
| 4 AM | 5:00 PM |
| 5 AM | 6:00 PM |
| 6 AM | 7:00 PM |
| 7 AM | 8:00 PM |
| 8 AM | 9:00 PM |
| 9 AM | 10:00 PM |
| 10 AM | 11:00 PM |
| 11 AM | 12:00 AM (next day) |
| 12 PM | 1:00 AM (next day) |
| 1 PM | 2:00 AM (next day) |
| 2 PM | 3:00 AM (next day) |
| 3 PM | 4:00 AM (next day) |
| 4 PM | 5:00 AM (next day) |
| 5 PM | 6:00 AM (next day) |
| 6 PM | 7:00 AM (next day) |
| 7 PM | 8:00 AM (next day) |
| 8 PM | 9:00 AM (next day) |
| 9 PM | 10:00 AM (next day) |
| 10 PM | 11:00 AM (next day) |
| 11 PM | 12:00 PM (next day) |
Daylight saving
On November 1, 2026, Boston shifts for daylight saving. After that, Seoul will be 14 hours ahead of Boston (currently 13 hours ahead of Boston). The converter and the tables above always reflect the correct offset for the date you pick.
- Boston is currently observing daylight saving time.
- Seoul does not observe daylight saving time.
Frequently asked questions
- Is Seoul ahead of or behind Boston?
- Seoul is 13 hours ahead of Boston.
- How many hours ahead of Boston is Seoul?
- Seoul is 13 hours ahead of Boston.
- What time is 9 AM in Boston in Seoul?
- 9:00 AM in Boston is 10:00 PM in Seoul.
- What time is noon in Boston in Seoul?
- 12:00 PM in Boston is 1:00 AM the next day in Seoul.
- What time is 5 PM in Boston in Seoul?
- 5:00 PM in Boston is 6:00 AM the next day in Seoul. Useful for end-of-day handoffs between the two offices.
- What time is 3 PM in Boston in Seoul?
- 3:00 PM in Boston is 4:00 AM the next day in Seoul.
- Is Boston currently observing daylight saving time?
- Boston is currently observing daylight saving time (summer time).
- Is Seoul currently observing daylight saving time?
- Seoul does not observe daylight saving time — its UTC offset stays the same all year.
- Do Boston and Seoul observe daylight saving?
- On November 1, 2026, Boston shifts for daylight saving. After that, Seoul will be 14 hours ahead of Boston (currently 13 hours ahead of Boston). The converter and the tables above always reflect the correct offset for the date you pick.
- When is the best time to call Seoul from Boston?
- Boston and Seoul business hours don't overlap. The closest options are early mornings in Boston or late evenings, when one side stretches outside 9–5.
- When is the best time to call Boston from Seoul?
- Seoul and Boston business hours don't overlap. The closest options are early mornings in Seoul or late evenings, when one side stretches outside 9–5.
- Boston (EDT) to Seoul (KST) — how do I convert quickly?
- Add 13 hours to Boston local time to get Seoul local time. Or use the converter at the top of this page — it stays accurate through daylight-saving changes automatically.
Other conversions
- Boston to New York
- Boston to London
- Boston to Tokyo
- Boston to Dubai
- Boston to Singapore
- Boston to Los Angeles
- Boston to Sydney
- Boston to Paris
- Boston to Mumbai
- Boston to Hong Kong