Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

Chicago to Tokyo

+14h

Chicago

CDTSOURCE

USA · UTC-05:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Tokyo

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

Tokyo

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 Tokyo

Wikipedia

Tokyo operates on Japan Standard Time (JST), which is 14 hours ahead of New York. As Asia's largest financial hub, Tokyo trading hours are crucial for global markets.

Population:14 million

Metro:37.4 million

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

Currency:JPY (¥)

Stock Exchange:TSE (Tokyo Stock Exchange)

Key Landmarks

Tokyo TowerShibuya CrossingSenso-ji TempleImperial PalaceTokyo Skytree

Did You Know?

The Tokyo subway system moves approximately 8.7 million passengers daily.

Learn more about JST timezone →

Time Conversion Guide: Chicago to Tokyo

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

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

Chicago to Tokyo time conversion table

Chicago (CDT)	Tokyo (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 Tokyo time

Scheduling a call from Chicago to Tokyo: a 10:00 AM start in Chicago lands at 12:00 AM in Tokyo the next day, so you can confirm the slot without doing the arithmetic yourself.
Handling a +14h gap: Chicago and Tokyo 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 Tokyo is 11:00 PM in Chicago.
Booking travel or deliveries: tracking Tokyo local time against Chicago keeps pickup windows and arrival estimates honest across the +14h offset.

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 Tokyo 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 Tokyo

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

Tokyo

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 Tokyo?

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

How do I convert Chicago time to Tokyo time?

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

What time is it in Tokyo right now?

Tokyo 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 Tokyo 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 Tokyo.

Which is ahead, Chicago or Tokyo?

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

Do Chicago and Tokyo use different time zones?

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

Does daylight saving time affect the Chicago–Tokyo difference?

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

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

What is the time difference between Chicago and Tokyo?

Tokyo 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 Tokyo in?

Tokyo operates on Japan Standard Time (JST), which is 14 hours ahead of New York. As Asia's largest financial hub, Tokyo trading hours are crucial for global markets.

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 Tokyo?

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

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

The best overlap for a call is when both cities are in business hours. Chicago works 8:00 AM - 5:00 PM CST and Tokyo 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 Tokyo?

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

How do Chicago and Tokyo compare in size?

Chicago has a population of approximately 2.7 million (metro: 9.5 million), while Tokyo has approximately 14 million (metro: 37.4 million).

What are the major landmarks in Chicago and Tokyo?

Chicago is known for Willis Tower, Millennium Park, Cloud Gate (The Bean). Tokyo is famous for Tokyo Tower, Shibuya Crossing, Senso-ji Temple.

Do Chicago and Tokyo have stock exchanges?

Yes. Chicago has the CME (Chicago Mercantile Exchange), CBOE and Tokyo has the TSE (Tokyo Stock Exchange). The +14h time difference affects trading hour overlaps between these exchanges.