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Convert JST to ET

Japan Standard Time (JST) to Eastern Time (ET)

Japanese engineering teams, trading desks in Tokyo, and business development managers coordinating with US East Coast headquarters convert to EST daily. The near-half-day offset means most communication is async, with a narrow window at the edges of each team's workday.

When it's 12:00 PM JST, it's 11:00 PM ET (previous day)

UTC+9 UTC-4 -13 hours

Interactive Converter

Pick any time and date to convert between JST and ET.

JST to ET Conversion Table

Full 24-hour comparison. Business hours (9 AM -- 6 PM) are highlighted.

JST ET
12:00 AM 11:00 AM -1 day
1:00 AM 12:00 PM -1 day
2:00 AM 1:00 PM -1 day
3:00 AM 2:00 PM -1 day
4:00 AM 3:00 PM -1 day
5:00 AM 4:00 PM -1 day
6:00 AM 5:00 PM -1 day
7:00 AM 6:00 PM -1 day
8:00 AM 7:00 PM -1 day
9:00 AM 8:00 PM -1 day
10:00 AM 9:00 PM -1 day
11:00 AM 10:00 PM -1 day
12:00 PM 11:00 PM -1 day
1:00 PM 12:00 AM
2:00 PM 1:00 AM
3:00 PM 2:00 AM
4:00 PM 3:00 AM
5:00 PM 4:00 AM
6:00 PM 5:00 AM
7:00 PM 6:00 AM
8:00 PM 7:00 AM
9:00 PM 8:00 AM
10:00 PM 9:00 AM
11:00 PM 10:00 AM

Best Meeting Window

Top meeting times for teams in JST and ET (9 AM -- 6 PM work hours, 1-hour meeting).

12a
3a
6a
9a
12p
3p
6p
9p
JST GMT+9
ET EDT
Overlap
Everyone available
Most available
Some overlap
Outside work hours
1 2:00 AM -- 3:00 AM JST
JST: 2:00 AM ET: 1:00 PM

1 of 2 members within working hours. 1 in mid-day range (9 AM–5 PM). Outside work hours for JST.

5.9 / 10
2 3:00 AM -- 4:00 AM JST
JST: 3:00 AM ET: 2:00 PM

1 of 2 members within working hours. 1 in mid-day range (9 AM–5 PM). Outside work hours for JST.

5.9 / 10
3 1:00 PM -- 2:00 PM JST
JST: 1:00 PM ET: 12:00 AM

1 of 2 members within working hours. 1 in mid-day range (9 AM–5 PM). Outside work hours for ET.

5.9 / 10

Try the Meeting Planner with custom work hours →

Scheduling Tips

  • Schedule daily syncs at 8:00-9:00 AM EST / 10:00-11:00 PM JST. Keep them to 30 minutes max since it is late evening in Tokyo.
  • For quarterly reviews or longer meetings, use 7:00-9:00 PM EST / 9:00-11:00 AM JST (next day) so both teams are in business hours.
  • Document everything in shared project management tools. With a near-14-hour gap, a missed async update can cost a full 24-hour cycle.

Time Difference & DST

ET is 13 hours behind JST. JST is at UTC+9 and ET is at UTC-4.

Upcoming DST Transitions:

ET Clocks fall back on November 2, 2026

The conversion table above reflects the current DST state at build time. Use the interactive converter for live, date-specific conversions.

Major Cities

Japan Standard Time (JST)

  • Tokyo
  • Osaka
  • Yokohama

Eastern Time (ET)

  • New York
  • Miami
  • Atlanta

Frequently Asked Questions

What is the time difference between JST and EST?
JST (Japan Standard Time, UTC+9) is 14 hours ahead of EST (Eastern Standard Time, UTC-5). When it is 9:00 AM in Tokyo, it is 7:00 PM EST the previous day. During EDT (UTC-4), the gap is 13 hours.
Does the JST-EST offset change?
It changes when the US switches between EST and EDT. Japan does not observe daylight saving time, so JST stays at UTC+9 year-round. The gap is 14 hours during EST (November-March) and 13 hours during EDT (March-November).
What is 9 AM JST in EST?
9:00 AM JST is 7:00 PM EST the previous day. During EDT, 9:00 AM JST is 8:00 PM EDT the previous day. The start of the Tokyo workday falls in the previous evening for New York.
What is 6 PM JST in EST?
6:00 PM JST is 4:00 AM EST the same day. During EDT, 6:00 PM JST is 5:00 AM EDT. End-of-day Tokyo is the middle of the night for New York.
What is 10 PM JST in EST?
10:00 PM JST is 8:00 AM EST the same day. During EDT, 10:00 PM JST is 9:00 AM EDT. Late evening Tokyo catches the start of the US East Coast workday.
What is the best meeting time for JST and EST teams?
The primary window is 8:00-10:00 AM EST / 10:00 PM-12:00 AM JST, which is late for Tokyo but catches the US morning. Alternatively, 7:00-9:00 PM EST / 9:00-11:00 AM JST (next day) catches Japan's morning hours.
How do Japan-US teams manage the time gap?
Most successful teams use a follow-the-sun model: Japan completes work during their day and hands off to the US team by end-of-day JST. The US picks up, completes their portion, and hands back by end-of-day EST. A brief daily sync at the overlap point keeps teams aligned.
When does the JST-EST offset shift?
The offset shifts on US DST boundaries only. In March (second Sunday), the US moves to EDT and the gap shrinks from 14 to 13 hours. In November (first Sunday), the US reverts to EST and the gap widens back to 14 hours. Japan's clock never changes.

Related Guides

Best Time to Call Japan from the UK

Discover the best meeting windows between GMT/BST and JST. Practical tips for UK–Japan team scheduling.

 Scheduling Across Time Zones: Best Practices for Global Teams

Proven strategies for scheduling meetings across multiple time zones. Reduce late-night calls and improve team fairness.

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