CST to JST Converter
JST is 15 hours ahead of CST. 9:00 AM CST = 12:00 AM JST (next day).
JST is 15 hours ahead of CST at the moment. To convert CST to JST, add 15 hours to the CST time: 9:00 AM CST = 12:00 AM JST (next day).
CST (Central Time) is used in Chicago, Dallas, Houston, Minneapolis, New Orleans, Winnipeg; Mexico City and Central America use UTC−6 all year. JST (Japan Time) is used in Japan.
CST here means North American Central Standard Time, not China Standard Time.
CST to JST time conversion table
CST to JST on 6 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| CST | JST | Day |
|---|---|---|
| 12:00 AM CST | 3:00 PM JST | — |
| 1:00 AM CST | 4:00 PM JST | — |
| 2:00 AM CST | 5:00 PM JST | — |
| 3:00 AM CST | 6:00 PM JST | — |
| 4:00 AM CST | 7:00 PM JST | — |
| 5:00 AM CST | 8:00 PM JST | — |
| 6:00 AM CST | 9:00 PM JST | — |
| 7:00 AM CST | 10:00 PM JST | night |
| 8:00 AM CST | 11:00 PM JST | night |
| 9:00 AM CST | 12:00 AM JST | next day |
| 10:00 AM CST | 1:00 AM JST | next day |
| 11:00 AM CST | 2:00 AM JST | next day |
| 12:00 PM CST | 3:00 AM JST | next day |
| 1:00 PM CST | 4:00 AM JST | next day |
| 2:00 PM CST | 5:00 AM JST | next day |
| 3:00 PM CST | 6:00 AM JST | next day |
| 4:00 PM CST | 7:00 AM JST | next day |
| 5:00 PM CST | 8:00 AM JST | next day |
| 6:00 PM CST | 9:00 AM JST | next day |
| 7:00 PM CST | 10:00 AM JST | next day |
| 8:00 PM CST | 11:00 AM JST | next day |
| 9:00 PM CST | 12:00 PM JST | next day |
| 10:00 PM CST | 1:00 PM JST | next day |
| 11:00 PM CST | 2:00 PM JST | next day |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert CST to JST
Add 15 hours to the CST time to get JST.
Example: 9:00 AM CST = 12:00 AM JST (next day).
Across midnight: 10:00 PM CST = 1:00 PM JST (next day). The date changes, so always check the day as well as the hour.
Time difference between CST and JST
The time difference between CST and JST is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 31 Dec 2025 – 7 Mar 2026: JST is 15 hours ahead of CST.
- 8 Mar 2026 – 31 Oct 2026: JST is 14 hours ahead of CST.
- 1 Nov 2026 – 30 Dec 2026: JST is 15 hours ahead of CST.
CST and JST during daylight saving time
- CST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from CST (UTC−6) to CDT (UTC−5).
- JST does not observe daylight saving time; it stays on UTC+9 all year.
Best time for a meeting between CST and JST
CST and JST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM CST, which is 10:00 PM JST.
CST to JST FAQ
What is the time difference between CST and JST?
Right now JST is 15 hours ahead of CST. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM CST in JST?
9:00 AM CST is 12:00 AM JST (next day).
What is 12 PM (noon) CST in JST?
12:00 PM CST is 3:00 AM JST (next day).
Is JST ahead of or behind CST?
JST is 15 hours ahead of CST, so it is later in JST than in CST.
Does CST change for daylight saving time?
Yes. CST next changes on 14 Mar 2027, when clocks go forward one hour from CST to CDT.
Does JST change for daylight saving time?
No. JST stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between CST and JST?
CST and JST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM CST, which is 10:00 PM JST.
Is CT the same as CST?
CST is the winter (standard) name of Central Time (CT). From March to November the same clocks are called CDT. This converter always uses the one in force on the date you choose.
Related conversions
Convert JST to CST
Convert CST to other time zones
Convert other time zones to JST
Learn more
Updated 6 November 2026. Time zone data: IANA tz database.