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CST/CDT

Central Standard Time

UTC−6

12am

3am

6am

9am

12pm

3pm

6pm

9pm

Central Time is on standard time: CST (UTC−6) until Sun, Mar 14, 2027.

Keep CDT (UTC−5)

NZDT/NZST

New Zealand Daylight Time

UTC+13

tomorrow

19h ahead

12am

3am

6am

9am

12pm

3pm

6pm

9pm

New Zealand is on daylight saving time: NZDT (UTC+13) until Sun, Apr 4, 2027.

Use NZST all year (UTC+12)

Quick answers

Selected conversion

9:30 am09:30 CST (UTC-6), Nov 1, 2026 = 4:30 am04:30 NZDT (UTC+13), Nov 2, 2026

CST is 19 hours behind NZDT.

CDT and NZST examples

These examples always use CDT (UTC-5) and NZST (UTC+12). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

CDT is 17 hours behind NZST.

How the time difference changes

Depending on seasonal clock changes, CDT is 17 hours behind NZST, CDT is 18 hours behind NZDT, or CST is 19 hours behind NZDT.

Depending on seasonal clock changes, working hours of 9:00 am to 6:00 pm in CDT correspond to 2:00 am (next day) to 11:00 am (next day) in NZST, working hours of 9:00 am to 6:00 pm in CDT correspond to 3:00 am (next day) to 12:00 pm (next day) in NZDT, or working hours of 9:00 am to 6:00 pm in CST correspond to 4:00 am (next day) to 1:00 pm (next day) in NZDT.Depending on seasonal clock changes, working hours of 09:00 to 18:00 in CDT correspond to 02:00 (next day) to 11:00 (next day) in NZST, working hours of 09:00 to 18:00 in CDT correspond to 03:00 (next day) to 12:00 (next day) in NZDT, or working hours of 09:00 to 18:00 in CST correspond to 04:00 (next day) to 13:00 (next day) in NZDT.

Compare CDT time with NZST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Central Standard Time is 19 hours behind New Zealand Daylight Time.
9:30 am09:30 in CST is 4:30 am04:30 in NZDT

CST to NZDT call time
Best time for a conference call or a meeting is between 2pm-6pm14:00-18:00 in CST which corresponds to 9am-1pm09:00-13:00 in NZDT (next day)

9:30 am09:30 Central Standard Time (CST). Offset UTC -6:00 hours
4:30 am04:30 New Zealand Daylight Time (NZDT). Offset UTC +13:00 hours

9:30 am09:30 CST / 4:30 am04:30 NZDT

Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.

Hourly time comparison
CST	NZDT
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Central Daylight Time

Offset: CDT is 5 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Canada, Mexico, United States

Principal Cities: The largest city in the CDT time zone is Chicago in the United States, with about 2.664 million people. Other major cities in this time zone include Houston, San Antonio, Dallas, Fort Worth.

French: HAC - Heure Avancée du Centre

Spanish: CT - Zona Centro

Map of the areas on Central Daylight Time (CDT) — CDT part of the year
Today the shaded areas are on UTC−6 (Central Standard Time).
Open the world time zone map © OpenStreetMap

Daylight Saving: Central Daylight Time (CDT) is a daylight saving/summer time zone, but some places set clocks back one hour during winter and observe Central Standard Time (CST).

End: Central Daylight Time (CDT) ended on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 1, 2026, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the first Sunday of November.

Start: Central Daylight Time (CDT) starts on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00. Daylight saving starts annually on the second Sunday of March.

See USA daylight saving time and upcoming clock changes worldwide.

CDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data

-05 - basic short
-0500 - basic
-05:00 - extended

Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers

-0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates an offset of five hours to the west of the zero meridian.

Military/NATO: Used by the U.S. military, Chinese military and others

Romeo - Military abbreviation for CDT
R - short form of 'Romeo'

IANA/Olson: Reflects CDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems

America/Chicago
America/Indiana/Knox
America/Indiana/Tell_City
America/Knox_IN
America/Matamoros
America/Menominee
America/North_Dakota/Beulah
America/North_Dakota/Center
America/North_Dakota/New_Salem
America/Ojinaga
America/Rainy_River
America/Rankin_Inlet
America/Resolute
America/Winnipeg
CST6CDT
Canada/Central
US/Central
US/Indiana-Starke

CDT Abbreviation: Several time zones share CDT abbreviation and it could refer to these time zones

Central Daylight Time - UTC -5
Cuba Daylight Time - UTC -4

Time zones with the GMT -5 offset:

CDT - Central Daylight Time
EST - Eastern Standard Time
ET - Eastern Time
COT - Colombia Time
CST - Cuba Standard Time
EASST - Easter Island Summer Time
ECT - Ecuador Time
PET - Peru Time
R - Romeo Time Zone

New Zealand Standard Time

Offset: NZST is 12 hours ahead of Greenwich Mean Time (GMT).

Countries using this time zone: Antarctica, New Zealand

Principal Cities: The largest city in the NZST time zone is Auckland in New Zealand, with about 1.547 million people. Other major cities in this time zone include Christchurch, Wellington, Hamilton, Tauranga.

Map of the areas on New Zealand Standard Time (NZST) — NZST part of the year
Today the shaded areas are on UTC+13 (NZDT).
Open the world time zone map © OpenStreetMap

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe New Zealand Daylight Time (NZDT).

End: New Zealand Standard Time (NZST) ended on Sunday, September 27, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, September 27, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the last Sunday of September.

Start: New Zealand Standard Time (NZST) starts on Sunday, April 4, 2027 at 3:00 am03:00 local time and clocks are set one hour back to Sunday, April 4, 2027, 2:00 am02:00. Standard time starts annually on the first Sunday of April.

See New Zealand daylight saving time and upcoming clock changes worldwide.

NZST representations, usage and related time zones