Time Difference: Seoul vs Washington
Washington is 13 hours behind Seoul.
Quick Reference
- Seoul
- KST (GMT+9)
No Daylight Saving Time
- Washington
- EDT (GMT-4)
EST starts on Nov 1, 2026
Frequently Asked Questions
- What is the time difference between Seoul and Washington?
- Washington is 13 hours behind Seoul.
- When is the best time to call from Seoul to Washington?
- The best time to call is during overlapping business hours (9 AM – 5 PM) in both cities. Use the interactive converter on this page to visually compare hours side by side.
- Does the time difference change with daylight saving time?
- The time difference may change when either city enters or exits daylight saving time. Seoul uses KST and Washington uses EDT.