JST to EDT Converter & Meeting Planner
Quick answer: 9:00 AM JST = 8:00 PM EDT (fixed +09:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Japan Standard Time (JST) and Eastern Daylight Time (EDT)? You need to account for the standard time difference. Eastern Daylight Time is normally 13 hours behind Japan Standard Time. Whether you are coordinating between teams in Tokyo and Osaka and New York and Washington D.C., our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM JST = 11:00 AM EDT. The full 24-hour JST to EDT table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM JST = 2:00 AM EDT.
| JST Time | EDT Time |
|---|---|
| 12:00 AM (00:00) | 11:00 AM (11:00)-1 day |
| 1:00 AM (01:00) | 12:00 PM (12:00)-1 day |
| 2:00 AM (02:00) | 1:00 PM (13:00)-1 day |
| 3:00 AM (03:00) | 2:00 PM (14:00)-1 day |
| 4:00 AM (04:00) | 3:00 PM (15:00)-1 day |
| 5:00 AM (05:00) | 4:00 PM (16:00)-1 day |
| 6:00 AM (06:00) | 5:00 PM (17:00)-1 day |
| 7:00 AM (07:00) | 6:00 PM (18:00)-1 day |
| 8:00 AM (08:00) | 7:00 PM (19:00)-1 day |
| 9:00 AM (09:00) | 8:00 PM (20:00)-1 day |
| 10:00 AM (10:00) | 9:00 PM (21:00)-1 day |
| 11:00 AM (11:00) | 10:00 PM (22:00)-1 day |
| 12:00 PM (12:00) | 11:00 PM (23:00)-1 day |
| 1:00 PM (13:00) | 12:00 AM (00:00) |
| 2:00 PM (14:00) | 1:00 AM (01:00) |
| 3:00 PM (15:00) | 2:00 AM (02:00) |
| 4:00 PM (16:00) | 3:00 AM (03:00) |
| 5:00 PM (17:00) | 4:00 AM (04:00) |
| 6:00 PM (18:00) | 5:00 AM (05:00) |
| 7:00 PM (19:00) | 6:00 AM (06:00) |
| 8:00 PM (20:00) | 7:00 AM (07:00) |
| 9:00 PM (21:00) | 8:00 AM (08:00) |
| 10:00 PM (22:00) | 9:00 AM (09:00) |
| 11:00 PM (23:00) | 10:00 AM (10:00) |
Best time to call New York from Tokyo
For most work calls, compare the normal business day in Tokyo (JST) with the business day in New York (EDT). JST commonly covers East Asia, while EDT is mainly associated with North America, Caribbean.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
⚠️ There is no clean same-day business-hours overlap on 2026-07-05. A practical compromise is around 10:00 PM JST, which reaches 9:00 AM EDT near the start of their workday.
- DST Safety: JST or EDT may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- Tokyo Stock Exchange (TSE): 09:00-15:00 local time in Tokyo.
- New York Stock Exchange (NYSE): 09:30-16:00 local time in New York.
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Frequently Asked Questions
What is the time difference between JST and EDT?
During standard time, Eastern Daylight Time is 13 hours behind Japan Standard Time.
Does Japan observe Daylight Saving Time?
Japan has not observed Daylight Saving Time since 1951, when the practice introduced during the Allied occupation was abolished by the Japanese government. JST has remained fixed at UTC+9:00 ever since, and there is no current legislation to reintroduce DST in Japan.
Is JST the same as Korean Standard Time (KST)?
Yes, South Korea's Korean Standard Time (KST) operates at the same UTC+9:00 offset as JST, and South Korea also does not observe Daylight Saving Time. The two countries share an identical clock year-round, which simplifies scheduling for the significant trade, technology, and cultural exchange between Tokyo and Seoul.
When does EDT start and end?
EDT begins on the second Sunday in March at 02:00 local time, when clocks spring forward one hour from EST (UTC-5) to EDT (UTC-4). It ends on the first Sunday in November at 02:00 local time, when clocks fall back to EST. In 2026, EDT runs from March 8 through November 1.
Is EDT the same as EST?
EDT and EST are two phases of the same Eastern Time zone, not two separate zones. EST (Eastern Standard Time) is the winter offset at UTC-5, observed from early November through mid-March. EDT (Eastern Daylight Time) is the summer offset at UTC-4, active during Daylight Saving Time — meaning New York and Toronto run one hour ahead of their winter clock for roughly eight months of every year.