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Chicago to JST

+14h

Chicago

CDTSOURCE
USA · UTC-05:00☀ DST active
HH12
:
MM00
  
12:00 (24-hr)
12 AM6 AM12 PM6 PM12 AM

JST

JST
UTC+09:00
HH02
:
MM00
  
(next day)02:00 (24-hr)
12 AM6 AM12 PM6 PM12 AM
Chicago
JST
12:00 AM
2:00 PM
2:00 AM
4:00 PM
4:00 AM
6:00 PM
6:00 AM
8:00 PM
8:00 AM
10:00 PM
10:00 AM
12:00 AM+1
12:00 PM
2:00 AM+1
2:00 PM
4:00 AM+1
4:00 PM
6:00 AM+1
6:00 PM
8:00 AM+1
8:00 PM
10:00 AM+1
10:00 PM
12:00 PM+1

Green rows indicate typical business hours (9 AM - 5 PM)

CDT and JST on the World Map

The map below highlights the CDT (Central Standard Time) and JST (Japan Standard Time) timezone regions across the globe.

CDTJSTChicagoHoustonDallasSan AntonioTokyoOsakaYokohamaNagoya
CDT Zone
→
JST Zone

Explore all world timezones interactively →

CST – Central Standard Time

UTC-06:00

Central Standard Time (CST) is the time zone for the central United States, Canada, and Mexico, 6 hours behind UTC.

Countries in CST
United States (Central)Canada (Manitoba, Saskatchewan)MexicoGuatemalaHondurasEl SalvadorCosta RicaNicaraguaBelize
Major Cities in CST
ChicagoHoustonDallasSan AntonioMexico CityAustinWinnipegMemphisMilwaukeeNashvilleKansas CityNew OrleansMinneapolisGuatemala City
Key Facts about CST
  • •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.
Daylight Saving:Yes – switches to CDT
Learn more about CST on Wikipedia

JST – Japan Standard Time

UTC+09:00

Japan Standard Time (JST) is the time zone for Japan, 9 hours ahead of UTC.

Countries in JST
Japan
Major Cities in JST
TokyoOsakaYokohamaNagoyaSapporoKyotoKobeFukuokaHiroshima
Key Facts about JST
  • •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.
Daylight Saving:No – UTC+09:00 year-round
Learn more about JST on Wikipedia

About Chicago

Wikipedia

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.

Population:2.7 million
Metro:9.5 million
Business Hours:8:00 AM - 5:00 PM CST
Currency:USD ($)
Stock Exchange:CME (Chicago Mercantile Exchange), CBOE
Key Landmarks
Willis TowerMillennium ParkCloud Gate (The Bean)Navy PierArt Institute of Chicago
Did You Know?

The Chicago Board of Trade is the world's oldest futures and options exchange.

Learn more about CDT timezone →

Comparing Time Zones: Chicago and JST

Chicago runs on Central Daylight Time (CDT) at UTC-05:00, currently observing daylight saving time. JST runs on Japan Standard Time (JST) at UTC+09:00. That puts Chicago 14 hours ahead of JST — a difference of +14h at the current offsets.

In practice, when it is 9:00 AM in Chicago it is 11:00 PM in JST. Midnight in Chicago is 2:00 PM in JST.Chicago observes daylight saving time while JST does not, so the gap narrows or widens by an hour part of the year.

Chicago to JST time conversion table

Chicago (CDT)JST (JST)Day
12:00 AM2:00 PMsame day
6:00 AM8:00 PMsame day
7:00 AM9:00 PMsame day
8:00 AM10:00 PMsame day
9:00 AM11:00 PMsame day
12:00 PM2:00 AMnext day
3:00 PM5:00 AMnext day
5:00 PM7:00 AMnext day
6:00 PM8:00 AMnext day
9:00 PM11:00 AMnext day

Why people convert Chicago to JST time

  • Scheduling a call from Chicago to JST: a 10:00 AM start in Chicago lands at 12:00 AM in JST the next day, so you can confirm the slot without doing the arithmetic yourself.
  • Handling a +14h gap: Chicago and JST 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 JST is 11:00 PM in Chicago.
  • Coordinating a Chicago-based team with JST contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
  • Always state the zone abbreviation, not just the hour. "3:00 PM CDT" 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 Chicago takes the early slot, the next week JST does.
  • Chicago: Clocks fall back on Sun, Nov 1, 2026. Re-check this page after that date because the offset changes and so does the +14h gap.

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.

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.

Best time to call between Chicago and JST

With a +14h offset there is no overlap inside a normal 9 AM – 5 PM day. JST opens at 9:00 AM JST, which is 11:00 PM in Chicago, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Chicago and JST have no shared working hours because of the +14h gap. Teams need to alternate early starts or rely on asynchronous handovers.

Chicago is 14 hours ahead of JST (CDT UTC-05:00 → JST UTC+09:00). 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

Chicago

☀ Currently in DST

Standard: UTC-06:00 · DST: UTC-05:00

Clocks fall back on Sun, Nov 1, 2026

JST

Does not observe DST

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳
History of Timekeeping
From sundials to atomic clocks - 5000 years of measuring time
🌍
How Time Zones Work
UTC, offsets, and why zones don't follow straight lines
☀️
Daylight Saving Time
DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Chicago and JST?

Chicago (CDT, UTC-05:00) is 14 hours ahead of JST (JST, UTC+09:00). The gap is currently +14h.

How do I convert Chicago time to JST time?

Add +14h to Chicago local time. For example, 9:00 AM in Chicago is 11:00 PM in JST.

What time is it in JST right now?

JST uses JST at UTC+09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +14h offset from Chicago.

What is the best time to call JST from Chicago?

There is no shared working-hours window because of the +14h gap. The closest option is 1:00 PM in Chicago, which is 3:00 AM in JST.

Which is ahead, Chicago or JST?

Chicago is 14 hours ahead of JST. When it is 12:00 PM in Chicago it is 2:00 AM in JST.

Do Chicago and JST use different time zones?

Chicago (USA) uses CDT at UTC-05:00, while JST uses JST at UTC+09:00. The IANA identifiers are America/Chicago and Asia/Tokyo.

Does daylight saving time affect the Chicago–JST 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 Chicago's time zone?

CDT also covers Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis and 6 more.

Which countries use CDT, Chicago's zone?

CDT is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, Costa Rica, Nicaragua and 1 more.

Is there a day difference between Chicago and JST?

Sometimes. The +14h gap is large enough that 8:00 PM or later in Chicago already falls on the next day in JST.

What is the time difference between Chicago and JST?

JST is +14h from Chicago.

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 timezone is JST in?

JST operates on its local timezone.

What are the business hours in Chicago?

Standard business hours in Chicago are 8:00 AM - 5:00 PM CST.

Which countries use CST (Central Standard Time)?

CST is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, and 3 more countries.

Does CST observe daylight saving time?

Yes, CST switches to CDT during summer months.

What are some interesting facts about CST?

CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.

Which cities are in the JST timezone?

Major cities in the JST timezone include Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka.

What is the UTC offset for JST?

Japan Standard Time (JST) is at UTC+09:00.

What should I know about the JST timezone?

Japan does not observe daylight saving time. Tokyo is the most populous metropolitan area in the world.

When is it midnight in Chicago, what time is it in JST?

When it is 12:00 AM (midnight) in Chicago (CST), it is +14h later in JST (JST).

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