NZDT to Chicago
-18hNZDT
NZDTSOURCEChicago
CDTGreen rows indicate typical business hours (9 AM - 5 PM)
NZDT and CDT on the World Map
The map below highlights the NZDT (New Zealand Daylight Time) and CDT (Central Standard Time) timezone regions across the globe.
NZDT – New Zealand Daylight Time
UTC+13:00New Zealand Daylight Time (NZDT, UTC+13:00) is New Zealand's summer time zone, one of the earliest offsets in the world.
- •NZDT runs from the last Sunday in September to the first Sunday in April.
- •NZDT is UTC+13:00 — one of the earliest time offsets used anywhere.
- •New Zealand changes its clocks two to three weeks before Australia.
- •The Chatham Islands observe UTC+13:45 during their summer time.
CST – Central Standard Time
UTC-06:00Central Standard Time (CST) is the time zone for the central United States, Canada, and Mexico, 6 hours behind UTC.
- •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.
About Chicago
WikipediaChicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.
The Chicago Board of Trade is the world's oldest futures and options exchange.
Time Conversion Guide: NZDT to Chicago
NZDT runs on New Zealand Daylight Time (NZDT) at UTC+13:00. Chicago runs on Central Daylight Time (CDT) at UTC-05:00, also currently on daylight saving time. That puts NZDT 18 hours behind Chicago — a difference of -18h at the current offsets.
In practice, when it is 9:00 AM in NZDT it is 3:00 PM in Chicago on the previous day. Midnight in NZDT is 6:00 AM in Chicago.Chicago observes daylight saving time while NZDT does not, so the gap narrows or widens by an hour part of the year.
NZDT to Chicago time conversion table
| NZDT (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 NZDT to Chicago time
- Scheduling a call from NZDT to Chicago: a 10:00 AM start in NZDT 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: NZDT 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 NZDT.
- Keeping family and friends in sync: knowing that 8:00 PM in NZDT is 2:00 AM in Chicago makes it easy to avoid calling at 3 AM.
- 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 NZDT takes the early slot, the next week Chicago does.
- Chicago: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.
About NZDT (New Zealand Daylight Time)
New Zealand Daylight Time (NZDT) is the summer time zone for New Zealand, one hour ahead of New Zealand Standard Time (NZST, UTC+12:00). It runs from the last Sunday in September to the first Sunday in April, so New Zealand shifts a week or two earlier in spring than Australia. At UTC+13:00, NZDT is among the earliest offsets in the world — only Samoa, Tonga and parts of Kiribati run further ahead at certain times of year. Auckland and Wellington are 13 hours ahead of UTC during NZDT, 12 hours ahead of Sydney, and 18 hours ahead of New York. The Chatham Islands, 45 minutes further east, move to UTC+13:45.
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 NZDT 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 NZDT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
NZDT and Chicago have no shared working hours because of the -18h gap. Teams need to alternate early starts or rely on asynchronous handovers.
NZDT 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
NZDT
☀ 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:
Frequently Asked Questions
What is the time difference between NZDT and Chicago?
NZDT (NZDT, UTC+13:00) is 18 hours behind Chicago (CDT, UTC-05:00). The gap is currently -18h.
How do I convert NZDT time to Chicago time?
Add -18h to NZDT local time. For example, 9:00 AM in NZDT 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 NZDT.
What is the best time to call Chicago from NZDT?
There is no shared working-hours window because of the -18h gap. The closest option is 1:00 PM in NZDT, which is 7:00 PM in Chicago.
Which is behind, NZDT or Chicago?
NZDT is 18 hours behind Chicago. When it is 12:00 PM in NZDT it is 6:00 PM in Chicago.
Do NZDT and Chicago use different time zones?
NZDT 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 NZDT–Chicago difference?
Yes at the moment: Chicago is on daylight saving time and NZDT is not, so the -18h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share NZDT's time zone?
NZDT also covers Auckland, Wellington, Christchurch, Hamilton, Dunedin.
Which countries use NZDT, NZDT's zone?
NZDT is used in New Zealand.
Is there a day difference between NZDT and Chicago?
Sometimes. The -18h gap is large enough that 8:00 PM or later in NZDT already falls on the in Chicago.
What is the time difference between NZDT and Chicago?
Chicago is -18h from NZDT.
What timezone is NZDT in?
NZDT operates on its local timezone.
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 Chicago?
Standard business hours in Chicago are 8:00 AM - 5:00 PM CST.
Which countries use NZDT (New Zealand Daylight Time)?
NZDT is used in New Zealand.
Does NZDT observe daylight saving time?
Yes, NZDT switches to NZDT during summer months.
What are some interesting facts about NZDT?
NZDT runs from the last Sunday in September to the first Sunday in April. NZDT is UTC+13:00 — one of the earliest time offsets used anywhere.
Which cities are in the CST timezone?
Major cities in the CST timezone include Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis.
What is the UTC offset for CST?
Central Standard Time (CST) is at UTC-06:00. During daylight saving time, it shifts to CDT.
What should I know about the CST timezone?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
When is it midnight in NZDT, what time is it in Chicago?
When it is 12:00 AM (midnight) in NZDT (NZDT), it is -18h later in Chicago (CST).
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