JST to Chicago
-14hJST
JSTSOURCEChicago
CDTGreen rows indicate typical business hours (9 AM - 5 PM)
JST and CDT on the World Map
The map below highlights the JST (Japan Standard Time) and CDT (Central Standard Time) timezone regions across the globe.
JST – Japan Standard Time
UTC+09:00Japan Standard Time (JST) is the time zone for Japan, 9 hours ahead of UTC.
- •Japan does not observe daylight saving time.
- •Tokyo is the most populous metropolitan area in the world.
- •The Tokyo Stock Exchange operates from 9:00 AM to 3:00 PM JST.
- •JST is 14 hours ahead of EST and 9 hours ahead of GMT.
CST – Central Standard Time
UTC-06:00Central Standard Time (CST) is the time zone for the central United States, Canada, and Mexico, 6 hours behind UTC.
- •CST covers 20 US states fully or partially.
- •Chicago and Houston are the two largest cities in the Central Time Zone.
- •Mexico City, one of the world's most populous cities, operates on CST.
- •CST is 1 hour behind EST and 2 hours ahead of PST.
About Chicago
WikipediaChicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.
The Chicago Board of Trade is the world's oldest futures and options exchange.
Everything You Need to Know About JST and Chicago Time
JST runs on Japan Standard Time (JST) at UTC+09:00. Chicago runs on Central Daylight Time (CDT) at UTC-05:00, also currently on daylight saving time. That puts JST 14 hours behind Chicago — a difference of -14h at the current offsets.
In practice, when it is 9:00 AM in JST it is 7:00 PM in Chicago on the previous day. Midnight in JST is 10:00 AM in Chicago.Chicago observes daylight saving time while JST does not, so the gap narrows or widens by an hour part of the year.
JST to Chicago time conversion table
| JST (JST) | Chicago (CDT) | Day |
|---|---|---|
| 12:00 AM | 10:00 AM | previous day |
| 6:00 AM | 4:00 PM | previous day |
| 7:00 AM | 5:00 PM | previous day |
| 8:00 AM | 6:00 PM | previous day |
| 9:00 AM | 7:00 PM | previous day |
| 12:00 PM | 10:00 PM | previous day |
| 3:00 PM | 1:00 AM | same day |
| 5:00 PM | 3:00 AM | same day |
| 6:00 PM | 4:00 AM | same day |
| 9:00 PM | 7:00 AM | same day |
Why people convert JST to Chicago time
- Scheduling a call from JST to Chicago: a 10:00 AM start in JST lands at 8:00 PM in Chicago the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -14h gap: JST and Chicago have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in Chicago is 7:00 PM in JST.
- Keeping family and friends in sync: knowing that 8:00 PM in JST is 6:00 AM in Chicago makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM JST" is unambiguous; "3 PM" across a -14h gap is not.
- With a -14h gap there is no shared 9-to-5 window, so alternate the early start: one week JST takes the early slot, the next week Chicago does.
- Chicago: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.
About JST (Japan Standard Time)
Japan Standard Time (JST) is the standard time zone for all of Japan. Japan does not observe daylight saving time. JST is 9 hours ahead of UTC and 14 hours ahead of EST. The Tokyo Stock Exchange, the world's third largest by market capitalization, operates on JST. South Korea uses the same offset (KST) but it is a distinct time zone.
About CST (Central Standard Time)
Central Standard Time (CST) covers the central region of North America. It is the second most populous time zone in the US, including major cities like Chicago, Houston, and Dallas. CST is also used in Mexico City and much of Central America including Guatemala, Honduras, El Salvador, and Costa Rica. During summer, most of the US and Canada switch to Central Daylight Time (CDT, UTC-05:00), while Mexico and Central American countries generally remain on CST.
Best time to call between JST and Chicago
With a -14h offset there is no overlap inside a normal 9 AM – 5 PM day. Chicago opens at 9:00 AM CDT, which is 7:00 PM in JST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
JST and Chicago have no shared working hours because of the -14h gap. Teams need to alternate early starts or rely on asynchronous handovers.
JST is 14 hours behind Chicago (JST UTC+09:00 → CDT UTC-05:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
JST
Does not observe DST
Chicago
☀ Currently in DST
Standard: UTC-06:00 · DST: UTC-05:00
Clocks fall back on Sun, Nov 1, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between JST and Chicago?
JST (JST, UTC+09:00) is 14 hours behind Chicago (CDT, UTC-05:00). The gap is currently -14h.
How do I convert JST time to Chicago time?
Add -14h to JST local time. For example, 9:00 AM in JST is 7:00 PM in Chicago (previous day).
What time is it in Chicago right now?
Chicago uses CDT at UTC-05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -14h offset from JST.
What is the best time to call Chicago from JST?
There is no shared working-hours window because of the -14h gap. The closest option is 1:00 PM in JST, which is 11:00 PM in Chicago.
Which is behind, JST or Chicago?
JST is 14 hours behind Chicago. When it is 12:00 PM in JST it is 10:00 PM in Chicago.
Do JST and Chicago use different time zones?
JST uses JST at UTC+09:00, while Chicago (USA) uses CDT at UTC-05:00. The IANA identifiers are Asia/Tokyo and America/Chicago.
Does daylight saving time affect the JST–Chicago difference?
Yes at the moment: Chicago is on daylight saving time and JST is not, so the -14h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share JST's time zone?
JST also covers Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka and 1 more.
Which countries use JST, JST's zone?
JST is used in Japan.
Is there a day difference between JST and Chicago?
Sometimes. The -14h gap is large enough that 8:00 PM or later in JST already falls on the in Chicago.
What is the time difference between JST and Chicago?
Chicago is -14h from JST.
What timezone is JST in?
JST operates on its local timezone.
What timezone is Chicago in?
Chicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.
What are the business hours in Chicago?
Standard business hours in Chicago are 8:00 AM - 5:00 PM CST.
Which countries use JST (Japan Standard Time)?
JST is used in Japan.
Does JST observe daylight saving time?
No, JST does not observe daylight saving time and remains at UTC+09:00 year-round.
What are some interesting facts about JST?
Japan does not observe daylight saving time. Tokyo is the most populous metropolitan area in the world.
Which cities are in the CST timezone?
Major cities in the CST timezone include Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis.
What is the UTC offset for CST?
Central Standard Time (CST) is at UTC-06:00. During daylight saving time, it shifts to CDT.
What should I know about the CST timezone?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
When is it midnight in JST, what time is it in Chicago?
When it is 12:00 AM (midnight) in JST (JST), it is -14h later in Chicago (CST).
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