EST to JST Converter – Convert Eastern Time to Japan Time

JST is 14 hours ahead of EST, so to convert mentally, add 14 hours to your EST time. For example: 9:00 AM EST = 11:00 PM JST. Our converter automatically adjusts for Daylight Saving Time so you always get the right result.

JST (Japan Standard Time, UTC+9) is 14 hours ahead of EST (Eastern Standard Time, UTC-5) during standard time. For example, 9:00 AM EST = 11:00 PM JST. During DST periods, this difference changes by 1 hour when one or both zones observe Daylight Saving Time — our converter automatically applies the correct offset for any date you select.

JST is 14 hours ahead of EST, so standard 9–5 business hours do not overlap. The most practical window is early morning in EST (7–9 AM), which falls in the evening in JST — for example, 7:00 AM EST = 9:00 PM JST. Use our meeting planner to find the exact time for your date, especially around DST transitions.

Yes. EST (Eastern Standard Time) observes Daylight Saving Time. Clocks spring forward to EDT (UTC-4) on the second Sunday in March, and fall back to EST on the first Sunday in November. During the DST period, the difference with JST changes by 1 hour. Our converter always uses the current offset for the date you select.

Major cities in the EST (Eastern Standard Time, UTC-5) timezone include: New York, Boston, Miami, Atlanta, Washington DC, Philadelphia, Toronto. These cities switch to EDT (UTC-4) from the second Sunday in March to the first Sunday in November.

Major cities in the JST (Japan Standard Time, UTC+9) timezone include: Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Fukuoka. JST is a fixed-offset zone — these cities do not observe Daylight Saving Time.

JST is 14 hours ahead of EST. Because EST and JST are 14 hours apart, there is no standard business-hour overlap — plan for one side to take an early morning or late evening call. Always include both local times in calendar invites (for example, "2:00 PM EST / 4:00 AM JST (next day) JST"). Double-check around March and November (or March/October for European zones) when DST transitions can shift the offset by 1 hour. For full scheduling guidance, see our international meeting times guide.