JST to CST Converter
See the current time in JST (Tokyo) and CST (Chicago) side by side, the exact time difference right now, and convert any time between the two zones.
JST to CST Converter
Uses your browser's built-in, DST-aware time-zone data.
About converting JST to CST
Japan Standard Time (Tokyo) and Central Time (Chicago) are in different time zones, so a meeting, call or stream that's convenient in one may be early or late in the other. The clocks above update live and account for daylight saving automatically, so the time difference you see is the real one for today — not a fixed number that goes stale twice a year.
To plan across the two, type a time into the JST box (or tap a quick preset) and read the CST equivalent, including a "next day" or "previous day" note when the conversion crosses midnight. For any other pair of zones or cities, use the full timezone converter.
JST vs CST: the time difference through the year
The gap between JST and CST changes during the year because only one of them uses daylight saving.
| Period | Difference |
|---|---|
| Oct 23, 2026 – Oct 31, 2026 | CST 14 h behind JST |
| Nov 1, 2026 – Mar 13, 2027 | CST 15 h behind JST |
| Mar 14, 2027 – Oct 23, 2027 | CST 14 h behind JST |
Daylight-saving changes in the next year
| Zone | Date | Offset | Change |
|---|---|---|---|
| CST | Nov 1, 2026 | UTC−5 → UTC−6 | Clocks go back 1 hour |
| CST | Mar 14, 2027 | UTC−6 → UTC−5 | Clocks go forward 1 hour |
| CST | Nov 7, 2027 | UTC−5 → UTC−6 | Clocks go back 1 hour |
JST to CST conversion table
| JST | CST (when 14 h behind) | CST (when 15 h behind) |
|---|---|---|
| 12:00 AM | 10:00 AM (previous day) | 9:00 AM (previous day) |
| 1:00 AM | 11:00 AM (previous day) | 10:00 AM (previous day) |
| 2:00 AM | 12:00 PM (previous day) | 11:00 AM (previous day) |
| 3:00 AM | 1:00 PM (previous day) | 12:00 PM (previous day) |
| 4:00 AM | 2:00 PM (previous day) | 1:00 PM (previous day) |
| 5:00 AM | 3:00 PM (previous day) | 2:00 PM (previous day) |
| 6:00 AM | 4:00 PM (previous day) | 3:00 PM (previous day) |
| 7:00 AM | 5:00 PM (previous day) | 4:00 PM (previous day) |
| 8:00 AM | 6:00 PM (previous day) | 5:00 PM (previous day) |
| 9:00 AM | 7:00 PM (previous day) | 6:00 PM (previous day) |
| 10:00 AM | 8:00 PM (previous day) | 7:00 PM (previous day) |
| 11:00 AM | 9:00 PM (previous day) | 8:00 PM (previous day) |
| 12:00 PM | 10:00 PM (previous day) | 9:00 PM (previous day) |
| 1:00 PM | 11:00 PM (previous day) | 10:00 PM (previous day) |
| 2:00 PM | 12:00 AM | 11:00 PM (previous day) |
| 3:00 PM | 1:00 AM | 12:00 AM |
| 4:00 PM | 2:00 AM | 1:00 AM |
| 5:00 PM | 3:00 AM | 2:00 AM |
| 6:00 PM | 4:00 AM | 3:00 AM |
| 7:00 PM | 5:00 AM | 4:00 AM |
| 8:00 PM | 6:00 AM | 5:00 AM |
| 9:00 PM | 7:00 AM | 6:00 AM |
| 10:00 PM | 8:00 AM | 7:00 AM |
| 11:00 PM | 9:00 AM | 8:00 AM |
Best time to meet
- 9 AM–5 PM overlap when CST is 14 h behindnone — closest fit 8:00 AM–10:00 AM JST = 6:00 PM–8:00 PM CST (8 AM–8 PM in both)
- 9 AM–5 PM overlap when CST is 15 h behindnone — closest fit 8:00 AM–11:00 AM JST = 5:00 PM–8:00 PM CST (8 AM–8 PM in both)
The two zones
Japan Standard Time is UTC+9 all year. Japan has not used daylight saving since 1951.
Central Time is UTC−6 in winter (CST) and UTC−5 in summer (CDT). It covers Chicago, Dallas, Houston, Mexico City (which no longer uses DST) and Winnipeg. US daylight saving runs from the second Sunday in March to the first Sunday in November.