Seoul is 14 hours ahead of New York during EST, and 13 hours ahead during EDT. When it's 9:00 AM in New York (winter), it's 11:00 PM the same day in Seoul. South Korea does not observe DST.
Seoul uses KST (UTC+9) year-round while New York switches between EST (winter) and EDT (summer). The difference is 14 hours in winter and 13 hours in summer.
Early morning or evening NY works! 7:00 AM - 9:00 AM NY (winter) corresponds to 9:00 PM - 11:00 PM Seoul. Evening NY catches morning Seoul.
Seoul is a major tech hub (Samsung, LG, Hyundai) with growing business ties to NYC. Korean Air and Asiana operate multiple daily flights from JFK.