Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

Chicago to Osaka

+14h

Chicago

CDTSOURCE

USA · UTC-05:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Osaka

JST

Japan · UTC+09:00

HH02

MM00

(next day)02:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Chicago

Osaka

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.

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 →

About Osaka

Wikipedia

Osaka operates on Japan Standard Time (JST), UTC+9. As Japan's second economic center and a manufacturing hub, Osaka shares business hours with Tokyo.

Population:2.8 million

Metro:19 million

Business Hours:9:00 AM - 6:00 PM JST

Currency:JPY (¥)

Stock Exchange:OSE (Osaka Exchange - derivatives)

Key Landmarks

Osaka CastleDotonboriUniversal Studios JapanShitennoji TempleUmeda Sky Building

Did You Know?

Osaka Castle was originally built in 1583 and has been rebuilt several times.

Learn more about JST timezone →

Comparing Time Zones: Chicago and Osaka

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

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

Chicago to Osaka time conversion table

Chicago (CDT)	Osaka (JST)	Day
12:00 AM	2:00 PM	same day
6:00 AM	8:00 PM	same day
7:00 AM	9:00 PM	same day
8:00 AM	10:00 PM	same day
9:00 AM	11:00 PM	same day
12:00 PM	2:00 AM	next day
3:00 PM	5:00 AM	next day
5:00 PM	7:00 AM	next day
6:00 PM	8:00 AM	next day
9:00 PM	11:00 AM	next day

Why people convert Chicago to Osaka time

Scheduling a call from Chicago to Osaka: a 10:00 AM start in Chicago lands at 12:00 AM in Osaka the next day, so you can confirm the slot without doing the arithmetic yourself.
Handling a +14h gap: Chicago and Osaka 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 Osaka is 11:00 PM in Chicago.
Coordinating a Chicago-based team with Osaka 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 Osaka 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 Osaka

With a +14h offset there is no overlap inside a normal 9 AM – 5 PM day. Osaka 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 Osaka 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 Osaka (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

Osaka

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 Osaka?

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

How do I convert Chicago time to Osaka time?

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

What time is it in Osaka right now?

Osaka 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 Osaka 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 Osaka.

Which is ahead, Chicago or Osaka?

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

Do Chicago and Osaka use different time zones?

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

Does daylight saving time affect the Chicago–Osaka difference?

Yes at the moment: Chicago is on daylight saving time and Osaka 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 Osaka?

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

What is the time difference between Chicago and Osaka?

Osaka 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 Osaka in?

Osaka operates on Japan Standard Time (JST), UTC+9. As Japan's second economic center and a manufacturing hub, Osaka shares business hours with Tokyo.

What are the business hours in Chicago?

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

What are the business hours in Osaka?

Standard business hours in Osaka are 9:00 AM - 6:00 PM JST.

What is the best time to schedule a call between Chicago and Osaka?

The best overlap for a call is when both cities are in business hours. Chicago works 8:00 AM - 5:00 PM CST and Osaka works 9:00 AM - 6:00 PM JST (+14h difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in Chicago and Osaka?

Chicago uses USD ($) while Osaka uses JPY (¥). Check current exchange rates when planning travel or business between these cities.

How do Chicago and Osaka compare in size?

Chicago has a population of approximately 2.7 million (metro: 9.5 million), while Osaka has approximately 2.8 million (metro: 19 million).

What are the major landmarks in Chicago and Osaka?

Chicago is known for Willis Tower, Millennium Park, Cloud Gate (The Bean). Osaka is famous for Osaka Castle, Dotonbori, Universal Studios Japan.

Do Chicago and Osaka have stock exchanges?

Yes. Chicago has the CME (Chicago Mercantile Exchange), CBOE and Osaka has the OSE (Osaka Exchange - derivatives). The +14h time difference affects trading hour overlaps between these exchanges.