JST to CST converter
CST is usually 14 h behind JST. It is 15 h behind JST 1 Jan–8 Mar and 1 Nov–31 Dec 2026, because of daylight saving time.
JST to CST table
For 5 July 2026, when CST is 14 h behind JST. Other dates: see the table on the right.
| JST | CST |
|---|---|
| 12:00 AM | 10:00 AM prev. day |
| 1:00 AM | 11:00 AM prev. day |
| 2:00 AM | 12:00 PM prev. day |
| 3:00 AM | 1:00 PM prev. day |
| 4:00 AM | 2:00 PM prev. day |
| 5:00 AM | 3:00 PM prev. day |
| 6:00 AM | 4:00 PM prev. day |
| 7:00 AM | 5:00 PM prev. day |
| 8:00 AM | 6:00 PM prev. day |
| 9:00 AM | 7:00 PM prev. day |
| 10:00 AM | 8:00 PM prev. day |
| 11:00 AM | 9:00 PM prev. day |
| 12:00 PM | 10:00 PM prev. day |
| 1:00 PM | 11:00 PM prev. day |
| 2:00 PM | 12:00 AM |
| 3:00 PM | 1:00 AM |
| 4:00 PM | 2:00 AM |
| 5:00 PM | 3:00 AM |
| 6:00 PM | 4:00 AM |
| 7:00 PM | 5:00 AM |
| 8:00 PM | 6:00 AM |
| 9:00 PM | 7:00 AM |
| 10:00 PM | 8:00 AM |
| 11:00 PM | 9:00 AM |
When the difference changes
Computed from the IANA tz database (release 2026c). Governments can change these rules; the live converter uses your browser’s own copy of the database.
| 2026: from (UTC) | until (UTC) | CST vs JST |
|---|---|---|
| 1 January 2026 | 8 March 2026 | 15 h behind |
| 8 March 2026 | 1 November 2026 | 14 h behind |
| 1 November 2026 | 31 December 2026 | 15 h behind |
| 2027: from (UTC) | until (UTC) | CST vs JST |
|---|---|---|
| 1 January 2027 | 14 March 2027 | 15 h behind |
| 14 March 2027 | 7 November 2027 | 14 h behind |
| 7 November 2027 | 31 December 2027 | 15 h behind |
JST: Japan Standard Time · JST time now
Japan
CST: Central Time · CST time now
CST is also used for China Standard Time (UTC+8) and Cuba Standard Time. This page means US Central Time (America/Chicago), which switches to CDT (UTC−5) in summer.
Related converters
Questions
What is the time difference between JST and CST?
CST is usually 14 h behind JST. It is 15 h behind JST 1 Jan–8 Mar and 1 Nov–31 Dec 2026, because of daylight saving time.
What is 9 am JST in CST?
9:00 am JST is 7:00 PM CST the previous day, on dates when the usual difference applies. Use the converter above for any specific date.
Which JST does this page use?
Japan Standard Time, the clock time in Japan (IANA zone Asia/Tokyo).
Which CST does this page use?
CST is also used for China Standard Time (UTC+8) and Cuba Standard Time. This page means US Central Time (America/Chicago), which switches to CDT (UTC−5) in summer.