JST to CST Converter & Meeting Planner
Quick answer: 9:00 AM JST = 6:00 PM CST (fixed +09:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Japan Standard Time (JST) and Central Standard Time (CST)? You need to account for the standard time difference. Central Standard Time is normally 15 hours behind Japan Standard Time. Whether you are coordinating between teams in Tokyo and Osaka and Chicago and Dallas, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM JST = 9:00 AM CST. The full 24-hour JST to CST table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM JST = 12:00 AM CST.
| JST Time | CST Time |
|---|---|
| 12:00 AM (00:00) | 9:00 AM (09:00)-1 day |
| 1:00 AM (01:00) | 10:00 AM (10:00)-1 day |
| 2:00 AM (02:00) | 11:00 AM (11:00)-1 day |
| 3:00 AM (03:00) | 12:00 PM (12:00)-1 day |
| 4:00 AM (04:00) | 1:00 PM (13:00)-1 day |
| 5:00 AM (05:00) | 2:00 PM (14:00)-1 day |
| 6:00 AM (06:00) | 3:00 PM (15:00)-1 day |
| 7:00 AM (07:00) | 4:00 PM (16:00)-1 day |
| 8:00 AM (08:00) | 5:00 PM (17:00)-1 day |
| 9:00 AM (09:00) | 6:00 PM (18:00)-1 day |
| 10:00 AM (10:00) | 7:00 PM (19:00)-1 day |
| 11:00 AM (11:00) | 8:00 PM (20:00)-1 day |
| 12:00 PM (12:00) | 9:00 PM (21:00)-1 day |
| 1:00 PM (13:00) | 10:00 PM (22:00)-1 day |
| 2:00 PM (14:00) | 11:00 PM (23:00)-1 day |
| 3:00 PM (15:00) | 12:00 AM (00:00) |
| 4:00 PM (16:00) | 1:00 AM (01:00) |
| 5:00 PM (17:00) | 2:00 AM (02:00) |
| 6:00 PM (18:00) | 3:00 AM (03:00) |
| 7:00 PM (19:00) | 4:00 AM (04:00) |
| 8:00 PM (20:00) | 5:00 AM (05:00) |
| 9:00 PM (21:00) | 6:00 AM (06:00) |
| 10:00 PM (22:00) | 7:00 AM (07:00) |
| 11:00 PM (23:00) | 8:00 AM (08:00) |
Best time to call Chicago from Tokyo
For most work calls, compare the normal business day in Tokyo (JST) with the business day in Chicago (CST). JST commonly covers East Asia, while CST is mainly associated with North America, Central America.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
⚠️ There is no clean same-day business-hours overlap on 2026-07-05. A practical compromise is around 11:00 PM JST, which reaches 9:00 AM CST near the start of their workday.
- DST Safety: JST or CST may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- Tokyo Stock Exchange (TSE): 09:00-15:00 local time in Tokyo.
🔥 Popular JST & CST Converters
Frequently searched time zone conversions related to your search.
Related Time Converters
Explore nearby time zone offsets and reverse conversions related to JST and CST.
Frequently Asked Questions
What is the time difference between JST and CST?
During standard time, Central Standard Time is 15 hours behind Japan Standard Time.
Does Japan observe Daylight Saving Time?
Japan has not observed Daylight Saving Time since 1951, when the practice introduced during the Allied occupation was abolished by the Japanese government. JST has remained fixed at UTC+9:00 ever since, and there is no current legislation to reintroduce DST in Japan.
Is JST the same as Korean Standard Time (KST)?
Yes, South Korea's Korean Standard Time (KST) operates at the same UTC+9:00 offset as JST, and South Korea also does not observe Daylight Saving Time. The two countries share an identical clock year-round, which simplifies scheduling for the significant trade, technology, and cultural exchange between Tokyo and Seoul.
Is CST the same as Central Time (CT)?
Central Time (CT) is the umbrella term for the zone, while CST and CDT refer to its two seasonal offsets. CST (UTC-6) applies during standard time from November through March, and CDT (UTC-5) applies during Daylight Saving Time from March through November.
Does Mexico City use CST?
Mexico City operates on UTC-6, the same offset as CST, but it does not observe Daylight Saving Time following Mexico's elimination of the practice under a 2022 law. This means Mexico City stays at UTC-6 year-round while US and Canadian Central Time cities shift to UTC-5 each summer.