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CT to JST time converter
Japan is 14 hours ahead of US Central for 238 days of 2026, and 15 hours ahead of for the other 127 days, because daylight saving changes the gap.
CT to JST conversion table
Local time in US Central and the matching time in Japan on two reference dates, one in winter and one in summer for the northern hemisphere.
| US Central (CT) | Japan on 15 January | Japan on 15 July |
|---|---|---|
| 08:00 | 23:00 | 22:00 |
| 09:00 | 00:00 (+1 day) | 23:00 |
| 10:00 | 01:00 (+1 day) | 00:00 (+1 day) |
| 12:00 | 03:00 (+1 day) | 02:00 (+1 day) |
| 15:00 | 06:00 (+1 day) | 05:00 (+1 day) |
| 17:00 | 08:00 (+1 day) | 07:00 (+1 day) |
| 18:00 | 09:00 (+1 day) | 08:00 (+1 day) |
| 21:00 | 12:00 (+1 day) | 11:00 (+1 day) |
Best meeting times between US Central and Japan
- January: No overlap inside both working days. The closest flexible hours (07:00-21:00): 16:00-21:00 CT = 07:00-12:00 JST (+1 day).
- July: No overlap inside both working days. The closest flexible hours (07:00-21:00): 17:00-21:00 CT = 07:00-11:00 JST (+1 day).
Want to add more people? The meeting planner starts with these two zones and lets you add up to four more.
Daylight saving between CT and JST
- US Central moves its clocks forward on 8 March and back on 1 November in 2026.
- Japan does not change its clocks in 2026.
- The gap is 14 hours for 238 days and 15 hours for 127 days of 2026.
About the two zones
US Central. US Central Time is UTC-6 in winter (CST) and UTC-5 in summer (CDT), changing together with the other US zones.
Japan. Japan Standard Time is UTC+9 all year with no daylight saving.
Frequently asked questions
What time is 9 AM CT in JST?
On 15 January, 09:00 in US Central is 00:00 (+1 day) in Japan. On 15 July it is 23:00.
What is the time difference between US Central and Japan?
Japan is 14 hours ahead of US Central for 238 days of 2026, and 15 hours ahead of for the other 127 days, because daylight saving changes the gap.
Does the time difference between CT and JST change during the year?
Yes. US Central changes its clocks and Japan does not, so the gap moves between 14 and 15 hours. Always convert with the actual date.
When is the best time for a meeting between US Central and Japan?
No overlap inside both working days. The closest flexible hours (07:00-21:00): 16:00-21:00 CT = 07:00-12:00 JST (+1 day). In July: No overlap inside both working days. The closest flexible hours (07:00-21:00): 17:00-21:00 CT = 07:00-11:00 JST (+1 day).
More conversions
Need the time in a scheduler? Convert a local-time cron schedule to UTC, or see which jobs a clock change affects with the DST collision simulator.