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).

Auckland to Chicago

-18h

Auckland

NZDTSOURCE

New Zealand · UTC+13:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Chicago

CDT

USA · UTC-05:00☀ DST active

HH06

MM00

(previous day)18:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Auckland

Chicago

12:00 AM

6:00 AM-1

2:00 AM

8:00 AM-1

4:00 AM

10:00 AM-1

6:00 AM

12:00 PM-1

8:00 AM

2:00 PM-1

10:00 AM

4:00 PM-1

12:00 PM

6:00 PM-1

2:00 PM

8:00 PM-1

4:00 PM

10:00 PM-1

6:00 PM

12:00 AM

8:00 PM

2:00 AM

10:00 PM

4:00 AM

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

NZDT and CDT on the World Map

The map below highlights the NZDT (New Zealand Standard Time) and CDT (Central Standard Time) timezone regions across the globe.

NZDT Zone

→

CDT Zone

Explore all world timezones interactively →

NZST – New Zealand Standard Time

UTC+12:00

New Zealand Standard Time (NZST) is the time zone for New Zealand, 12 hours ahead of UTC.

Countries in NZST

New Zealand

Major Cities in NZST

AucklandWellingtonChristchurchHamiltonDunedin

Key Facts about NZST

•New Zealand is among the first major countries to see a new day.
•NZST is 17 hours ahead of EST.
•New Zealand observes DST from September to April (Southern Hemisphere summer).

Daylight Saving:Yes – switches to NZDT

Learn more about NZST on Wikipedia

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

About Auckland

Wikipedia

Auckland operates on New Zealand Standard Time (NZST), UTC+12. As the first major city to see each day, Auckland opens global business ahead of all other markets.

Population:1.7 million

Metro:1.7 million

Business Hours:9:00 AM - 5:00 PM NZST

Currency:NZD (NZ$)

Stock Exchange:NZX (New Zealand Exchange)

Key Landmarks

Sky TowerAuckland Harbour BridgeAuckland War Memorial MuseumWaiheke IslandRangitoto Island

Did You Know?

Auckland is the first major city to see the sunrise each day (along with cities further east).

Learn more about NZDT timezone →

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: Auckland and Chicago

Auckland runs on New Zealand Daylight Time (NZDT) at UTC+13:00, currently observing daylight saving time. Chicago runs on Central Daylight Time (CDT) at UTC-05:00, also currently on daylight saving time. That puts Auckland 18 hours behind Chicago — a difference of -18h at the current offsets.

In practice, when it is 9:00 AM in Auckland it is 3:00 PM in Chicago on the previous day. Midnight in Auckland is 6:00 AM in Chicago. Because both zones shift for daylight saving, the gap between them only changes during the few weeks each year when their transition dates differ.

Auckland to Chicago time conversion table

Auckland (NZDT)	Chicago (CDT)	Day
12:00 AM	6:00 AM	previous day
6:00 AM	12:00 PM	previous day
7:00 AM	1:00 PM	previous day
8:00 AM	2:00 PM	previous day
9:00 AM	3:00 PM	previous day
12:00 PM	6:00 PM	previous day
3:00 PM	9:00 PM	previous day
5:00 PM	11:00 PM	previous day
6:00 PM	12:00 AM	same day
9:00 PM	3:00 AM	same day

Why people convert Auckland to Chicago time

Scheduling a call from Auckland to Chicago: a 10:00 AM start in Auckland lands at 4:00 PM in Chicago the previous day, so you can confirm the slot without doing the arithmetic yourself.
Handling a -18h gap: Auckland 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 3:00 PM in Auckland.
Watching a live event or market open: Auckland viewers need 3:00 PM in Chicago to catch a 9:00 AM start there, and 6:00 PM if the event is anchored to Auckland.

Always state the zone abbreviation, not just the hour. "3:00 PM NZDT" is unambiguous; "3 PM" across a -18h gap is not.
With a -18h gap there is no shared 9-to-5 window, so alternate the early start: one week Auckland takes the early slot, the next week Chicago does.
Auckland: Clocks fall back on Sat, Apr 3, 2027. Re-check this page after that date because the offset changes and so does the -18h gap.
Chicago: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.

About NZST (New Zealand Standard Time)

New Zealand Standard Time (NZST) is the standard time zone for New Zealand and its dependencies. New Zealand is among the first countries to see a new calendar day. During summer (September to April), clocks advance to New Zealand Daylight Time (NZDT, UTC+13:00).

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 Auckland and Chicago

With a -18h offset there is no overlap inside a normal 9 AM – 5 PM day. Chicago opens at 9:00 AM CDT, which is 3:00 PM in Auckland, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Auckland and Chicago have no shared working hours because of the -18h gap. Teams need to alternate early starts or rely on asynchronous handovers.

Auckland is 18 hours behind Chicago (NZDT UTC+13:00 → 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

Auckland

☀ Currently in DST

Standard: UTC+12:00 · DST: UTC+13:00

Clocks fall back on Sat, Apr 3, 2027

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:

⏳

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 Auckland and Chicago?

Auckland (NZDT, UTC+13:00) is 18 hours behind Chicago (CDT, UTC-05:00). The gap is currently -18h.

How do I convert Auckland time to Chicago time?

Add -18h to Auckland local time. For example, 9:00 AM in Auckland is 3:00 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 -18h offset from Auckland.

What is the best time to call Chicago from Auckland?

There is no shared working-hours window because of the -18h gap. The closest option is 1:00 PM in Auckland, which is 7:00 PM in Chicago.

Which is behind, Auckland or Chicago?

Auckland is 18 hours behind Chicago. When it is 12:00 PM in Auckland it is 6:00 PM in Chicago.

Do Auckland and Chicago use different time zones?

Auckland (New Zealand) uses NZDT at UTC+13:00, while Chicago (USA) uses CDT at UTC-05:00. The IANA identifiers are Pacific/Auckland and America/Chicago.

Does daylight saving time affect the Auckland–Chicago difference?

Both zones observe DST, so the difference stays at -18h for most of the year and only changes during the weeks when their transition dates do not line up.

Which other cities share Auckland's time zone?

NZDT also covers Auckland, Wellington, Christchurch, Hamilton, Dunedin.

Which countries use NZDT, Auckland's zone?

NZDT is used in New Zealand.

Is there a day difference between Auckland and Chicago?

Sometimes. The -18h gap is large enough that 8:00 PM or later in Auckland already falls on the in Chicago.

What is the time difference between Auckland and Chicago?

Chicago is -18h from Auckland.

What timezone is Auckland in?

Auckland operates on New Zealand Standard Time (NZST), UTC+12. As the first major city to see each day, Auckland opens global business ahead of all other markets.

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 Auckland?

Standard business hours in Auckland are 9:00 AM - 5:00 PM NZST.

What are the business hours in Chicago?

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

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

The best overlap for a call is when both cities are in business hours. Auckland works 9:00 AM - 5:00 PM NZST and Chicago works 8:00 AM - 5:00 PM CST (-18h difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in Auckland and Chicago?

Auckland uses NZD (NZ$) while Chicago uses USD ($). Check current exchange rates when planning travel or business between these cities.

How do Auckland and Chicago compare in size?

Auckland has a population of approximately 1.7 million (metro: 1.7 million), while Chicago has approximately 2.7 million (metro: 9.5 million).

What are the major landmarks in Auckland and Chicago?

Auckland is known for Sky Tower, Auckland Harbour Bridge, Auckland War Memorial Museum. Chicago is famous for Willis Tower, Millennium Park, Cloud Gate (The Bean).

Do Auckland and Chicago have stock exchanges?

Yes. Auckland has the NZX (New Zealand Exchange) and Chicago has the CME (Chicago Mercantile Exchange), CBOE. The -18h time difference affects trading hour overlaps between these exchanges.