No overlap — one side will join outside working hours
JST (Tokyo)
EDT (New York)
00:00
11:00-1dWorking
01:00
12:00-1dWorking
02:00
13:00-1dWorking
03:00
14:00-1dWorking
04:00
15:00-1dWorking
05:00
16:00-1dWorking
06:00
17:00-1d
07:00
18:00-1d
08:00
19:00-1d
09:00Working
20:00-1doff
10:00Working
21:00-1doff
11:00Working
22:00-1doff
12:00Working
23:00-1doff
13:00Working
00:00off
14:00Working
01:00off
15:00Working
02:00off
16:00Working
03:00off
17:00
04:00
18:00
05:00
19:00
06:00
20:00
07:00
21:00
08:00
22:00
09:00Working
23:00
10:00Working
Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between jst and edt?
Japan Standard Time (jst) is UTC+9 and Eastern Daylight Time (edt) is UTC-4. The difference between them is 13 hours.
Where is jst used?
Japan Standard Time (jst) is used in Japan and surrounding regions. The IANA timezone identifier is Asia/Tokyo.
Where is edt used?
Eastern Daylight Time (edt) is used in USA and surrounding regions. The IANA timezone identifier is America/New_York.
How do I convert jst to edt?
Use the interactive converter above. Drag the time slider to any jst time and the edt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
JST (Tokyo) to EDT (New York) — exact time difference
JST (Tokyo) is 13 hours ahead of EDT (New York). When JST (Tokyo) clocks hit noon, EDT (New York) reads 23:00.
JST (Tokyo) observes Asia/Tokyo and EDT (New York) observes America/New_York — a 13 hours gap between them.
Working hours overlap
When JST (Tokyo) is in standard working hours, EDT (New York) is not — and vice versa. There is no mutual business window between these two locations.
Optimal meeting slots
No business hours overlap exists between JST (Tokyo) and EDT (New York). Showing the most balanced options with minimal inconvenience for both locations.
05:00 Tokyo / 16:00 New York⚡ One side off-hours
⚠️ 4h before working hours in Tokyo
09:00 Tokyo / 20:00 New York⚡ One side off-hours
⚠️ 4h after working hours in New York
04:00 Tokyo / 15:00 New York⚡ One side off-hours
⚠️ 5h before working hours in Tokyo
Assumes a standard 9 AM–5 PM workday in each location's local timezone.
Holiday calendar for both locations
⚡ Both locations have upcoming holidays, check availability before scheduling.
JST (Tokyo)7 holidays
Jul 20Marine Day
Aug 11Mountain Day
Sep 21Respect for the Aged Day
Sep 23Autumnal Equinox Day
Oct 12Sports Day
EDT (New York)8 holidays
Jun 19Juneteenth National Independence DaySOON
Jul 3Independence Day
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
Working across JST (Tokyo) and EDT (New York)
Working across JST (Tokyo) (Japan) and EDT (New York) (USA) is a challenge — the 13-hour difference means no shared business hours window under a standard schedule. Flexibility from at least one side is required.
💡 Best practice for cross-timezone meetings
⚡
05:00–06:00 in JST (Tokyo) corresponds to 16:00–17:00 in EDT (New York) (4h before working hours in Tokyo).
⚡
09:00–10:00 in JST (Tokyo) corresponds to 20:00–21:00 in EDT (New York) (4h after working hours in New York).
⚡
04:00–05:00 in JST (Tokyo) corresponds to 15:00–16:00 in EDT (New York) (5h before working hours in Tokyo).
Since there is no natural overlap, the options above represent the most balanced compromise, minimizing out-of-hours inconvenience for both sides.
Recurring meetings are particularly vulnerable to DST shifts. The ClockinSync Chrome Extension alerts you before the offset changes.
Drag the slider at the top to convert any JST (Tokyo) time instantly. You can also type natural language like "3pm", "15:00", or a location name to get an immediate answer.
