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 Honolulu

-5h

Chicago

CDTSOURCE

USA · UTC-05:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Honolulu

HST

USA · UTC-10:00

HH07

MM00

07:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Chicago

Honolulu

12:00 AM

7:00 PM-1

2:00 AM

9:00 PM-1

4:00 AM

11:00 PM-1

6:00 AM

1:00 AM

8:00 AM

3:00 AM

10:00 AM

5:00 AM

12:00 PM

7:00 AM

2:00 PM

9:00 AM

4:00 PM

11:00 AM

6:00 PM

1:00 PM

8:00 PM

3:00 PM

10:00 PM

5:00 PM

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

CDT and HST on the World Map

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

CDT Zone

→

HST 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

HST – Hawaii Standard Time

UTC-10:00

Hawaii Standard Time (HST) is the time zone for the Hawaiian Islands, 10 hours behind UTC.

Countries in HST

United States (Hawaii)

Major Cities in HST

HonoluluHiloKailuaPearl CityKapolei

Key Facts about HST

•Hawaii does not observe daylight saving time.
•HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
•Hawaii is one of only two US states that don't observe DST (the other is Arizona).

Daylight Saving:No – UTC-10:00 year-round

Learn more about HST 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 Honolulu

Wikipedia

Honolulu operates on Hawaii Standard Time (HST), UTC-10 with no daylight saving. Hawaii's consistent time makes it a predictable connection between Asia and mainland USA.

Population:350,000

Metro:1 million

Business Hours:8:00 AM - 5:00 PM HST

Currency:USD ($)

Key Landmarks

Waikiki BeachDiamond HeadPearl HarborIolani PalaceHanauma Bay

Did You Know?

Pearl Harbor memorial receives over 2 million visitors annually.

Learn more about HST timezone →

Chicago vs Honolulu: Offsets, DST and Best Call Times

Chicago runs on Central Daylight Time (CDT) at UTC-05:00, currently observing daylight saving time. Honolulu runs on Hawaii-Aleutian Standard Time (HST) at UTC-10:00. That puts Chicago 5 hours behind Honolulu — a difference of -5h at the current offsets.

In practice, when it is 9:00 AM in Chicago it is 4:00 AM in Honolulu. Midnight in Chicago is 7:00 PM in Honolulu.Chicago observes daylight saving time while Honolulu does not, so the gap narrows or widens by an hour part of the year.

Chicago to Honolulu time conversion table

Chicago (CDT)	Honolulu (HST)	Day
12:00 AM	7:00 PM	previous day
6:00 AM	1:00 AM	same day
7:00 AM	2:00 AM	same day
8:00 AM	3:00 AM	same day
9:00 AM	4:00 AM	same day
12:00 PM	7:00 AM	same day
3:00 PM	10:00 AM	same day
5:00 PM	12:00 PM	same day
6:00 PM	1:00 PM	same day
9:00 PM	4:00 PM	same day

Why people convert Chicago to Honolulu time

Scheduling a call from Chicago to Honolulu: a 10:00 AM start in Chicago lands at 5:00 AM in Honolulu, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Chicago and Honolulu are inside the 9-to-5 working day between 2:00 PM and 5:00 PM CDT time (9:00 AM–12:00 PM HST). That is roughly 3 hours of usable overlap.
Booking travel or deliveries: tracking Honolulu local time against Chicago keeps pickup windows and arrival estimates honest across the -5h offset.

Always state the zone abbreviation, not just the hour. "3:00 PM CDT" is unambiguous; "3 PM" across a -5h gap is not.
Block 2:00 PM–5:00 PM CDT as the recurring meeting window if you work primarily from Chicago and need Honolulu colleagues present.
Chicago: Clocks fall back on Sun, Nov 1, 2026. Re-check this page after that date because the offset changes and so does the -5h 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 HST (Hawaii Standard Time)

Hawaii Standard Time (HST) is used in the state of Hawaii and does not observe daylight saving time. This makes HST one of the most consistent time zones in the US. The Hawaiian Islands are among the last places on Earth to see a new calendar day.

Best time to call between Chicago and Honolulu

Both Chicago and Honolulu sit inside the 9 AM – 5 PM working day between 2:00 PM–5:00 PM CDT, which is 9:00 AM–12:00 PM HST. That gives roughly 3 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

Chicago and Honolulu overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.

Chicago is 5 hours behind Honolulu (CDT UTC-05:00 → HST UTC-10:00). The shared working window is 2:00 PM–5:00 PM CDT. 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

Honolulu

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 Honolulu?

Chicago (CDT, UTC-05:00) is 5 hours behind Honolulu (HST, UTC-10:00). The gap is currently -5h.

How do I convert Chicago time to Honolulu time?

Add -5h to Chicago local time. For example, 9:00 AM in Chicago is 4:00 AM in Honolulu.

What time is it in Honolulu right now?

Honolulu uses HST at UTC-10:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -5h offset from Chicago.

What is the best time to call Honolulu from Chicago?

Call between 2:00 PM and 5:00 PM CDT — that maps to 9:00 AM–12:00 PM HST and keeps both parties inside the working day.

Which is behind, Chicago or Honolulu?

Chicago is 5 hours behind Honolulu. When it is 12:00 PM in Chicago it is 7:00 AM in Honolulu.

Do Chicago and Honolulu use different time zones?

Chicago (USA) uses CDT at UTC-05:00, while Honolulu (USA) uses HST at UTC-10:00. The IANA identifiers are America/Chicago and Pacific/Honolulu.

Does daylight saving time affect the Chicago–Honolulu difference?

Yes at the moment: Chicago is on daylight saving time and Honolulu is not, so the -5h 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 Honolulu?

Not normally. The -5h gap only pushes the date over the previous day.

What is the time difference between Chicago and Honolulu?

Honolulu is -5h 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 Honolulu in?

Honolulu operates on Hawaii Standard Time (HST), UTC-10 with no daylight saving. Hawaii's consistent time makes it a predictable connection between Asia and mainland USA.

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 Honolulu?

Standard business hours in Honolulu are 8:00 AM - 5:00 PM HST.

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

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

How do Chicago and Honolulu compare in size?

Chicago has a population of approximately 2.7 million (metro: 9.5 million), while Honolulu has approximately 350,000 (metro: 1 million).

What are the major landmarks in Chicago and Honolulu?

Chicago is known for Willis Tower, Millennium Park, Cloud Gate (The Bean). Honolulu is famous for Waikiki Beach, Diamond Head, Pearl Harbor.

Do Chicago and Honolulu have stock exchanges?

Yes. Chicago has the CME (Chicago Mercantile Exchange), CBOE and Honolulu has the N/A (Uses NYSE/NASDAQ). The -5h time difference affects trading hour overlaps between these exchanges.