JST: Japan Standard Time
Japan Standard Time is UTC+9.
All of Japan, with no daylight saving time.
JST to CST converter
When it's 9:00 am in Tokyo, it's 7:00 pm the day before in Chicago (6:00 pm the day before from November to March). Your working days don't overlap at all, so someone starts early or stays late for every call.
Convert Japan Standard Time (JST) to Central Standard Time (CST) for any date and time.
Central Time is 14 hours behind Japan Standard Time from March to November, and 15 hours behind the rest of the year.
Right now JST is UTC+9 and Central Time is on CST (UTC−6). Central Time switches to daylight saving time on 14 March 2027.
9:00 am to 5:00 pm JST is 6:00 pm CST the day before to 2:00 am CST.
- 8:00 am JST5:00 pm CST the day before
- 9:00 am JST6:00 pm CST the day before
- 10:00 am JST7:00 pm CST the day before
- 12:00 pm JST9:00 pm CST the day before
- 3:00 pm JST12:00 am CST
- 5:00 pm JST2:00 am CST
Live: the current time
Japan Standard TimeReference
Japan
Wed, Nov 4
JST UTC+9ReferenceWorking hoursCentral Time
US, Canada & Mexico
Tue, Nov 3Previous day
CST UTC−6−15h from Japan Standard TimeOutside working hours
No shared working hours on Wed, Nov 4. Closest fit: 7:00 AM–8:00 AM and 9:00 AM–10:00 AM in Japan Standard Time, when 1 of 2 are at work and the rest are nearest their day.
Share a booking link insteadWorking hours: 9:00 AM–5:00 PM, Monday to FridayClosest fit
JST to CST conversion table
Every hour of the day in JST, converted to CST. Hatched cells are working hours (9:00 am to 5:00 pm); rows with the accent bar are working hours in both zones.
| JST | CSTUntil 14 March 2027 | CDTFrom 14 March 2027 |
|---|---|---|
| 12:00 am JST | 9:00 am CST(day before) | 10:00 am CDT(day before) |
| 1:00 am JST | 10:00 am CST(day before) | 11:00 am CDT(day before) |
| 2:00 am JST | 11:00 am CST(day before) | 12:00 pm CDT(day before) |
| 3:00 am JST | 12:00 pm CST(day before) | 1:00 pm CDT(day before) |
| 4:00 am JST | 1:00 pm CST(day before) | 2:00 pm CDT(day before) |
| 5:00 am JST | 2:00 pm CST(day before) | 3:00 pm CDT(day before) |
| 6:00 am JST | 3:00 pm CST(day before) | 4:00 pm CDT(day before) |
| 7:00 am JST | 4:00 pm CST(day before) | 5:00 pm CDT(day before) |
| 8:00 am JST | 5:00 pm CST(day before) | 6:00 pm CDT(day before) |
| 9:00 am JST | 6:00 pm CST(day before) | 7:00 pm CDT(day before) |
| 10:00 am JST | 7:00 pm CST(day before) | 8:00 pm CDT(day before) |
| 11:00 am JST | 8:00 pm CST(day before) | 9:00 pm CDT(day before) |
| 12:00 pm JST | 9:00 pm CST(day before) | 10:00 pm CDT(day before) |
| 1:00 pm JST | 10:00 pm CST(day before) | 11:00 pm CDT(day before) |
| 2:00 pm JST | 11:00 pm CST(day before) | 12:00 am CDT |
| 3:00 pm JST | 12:00 am CST | 1:00 am CDT |
| 4:00 pm JST | 1:00 am CST | 2:00 am CDT |
| 5:00 pm JST | 2:00 am CST | 3:00 am CDT |
| 6:00 pm JST | 3:00 am CST | 4:00 am CDT |
| 7:00 pm JST | 4:00 am CST | 5:00 am CDT |
| 8:00 pm JST | 5:00 am CST | 6:00 am CDT |
| 9:00 pm JST | 6:00 am CST | 7:00 am CDT |
| 10:00 pm JST | 7:00 am CST | 8:00 am CDT |
| 11:00 pm JST | 8:00 am CST | 9:00 am CDT |
Best times to meet
A 9-to-5 working day in JST and one in CST don't overlap. The closest fit is 9:00 am JST (6:00 pm CST the day before), when one of you starts early or stays late.
About these time zones
CST: Central Standard Time
Central Standard Time is UTC−6. CST is also used for China Standard Time (UTC+8) and Cuba Standard Time (UTC−5). This page converts North American Central Time.
Texas, Illinois, Minnesota, Louisiana and most of the Midwest and South, plus Manitoba in Canada. Saskatchewan and most of Mexico stay on CST all year. CT is the short form for the whole zone.
How the difference changes
Right now CST is 15 hours behind JST. From 14 March 2027, when US clocks go forward, the difference becomes 14 hours.
Frequently asked questions
Ask a questionCentral Time is 14 hours behind Japan Standard Time from March to November, and 15 hours behind the rest of the year. JST is UTC+9, and CST is UTC−6.
9:00 am JST is 6:00 pm CST the day before.
Yes, because Central Time changes its clocks and Japan Standard Time doesn't. Central Time is 14 hours behind Japan Standard Time from March to November, and 15 hours behind the rest of the year.
Related conversions
More free tools
Meeting planner
Add everyone's city and see the hours when all of you are at work.
Timezone clock
Every time zone on one 24-hour dial, a hand per city. See who is at work, awake or asleep.
Time zone abbreviations
EST, PST, CET, IST and the rest: full names, current time, offsets, where they are used.