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CDT/CST

Central Daylight Time

UTC−5

12am

3am

6am

9am

12pm

3pm

6pm

9pm

Central Time is on daylight saving time: CDT (UTC−5) until Sun, Nov 1.

Mexico City and Saskatchewan stay on CST (UTC−6).

Chicago · CDT (UTC−5)Mexico City, Saskatchewan · CST all year (UTC−6)

NDT/NST

Newfoundland Daylight Time

UTC−2:30

2h 30m ahead

12am

3am

6am

9am

12pm

3pm

6pm

9pm

Newfoundland Time is on daylight saving time: NDT (UTC−2:30) until Sun, Nov 1.

Use NST all year (UTC−3:30)

Quick answers

Selected conversion

7:00 am07:00 CDT (UTC-5), Oct 23, 2026 = 9:30 am09:30 NDT (UTC-2:30), Oct 23, 2026

CDT is 2 hours and 30 minutes behind NDT.

CST (US winter time, UTC-6) and NST examples

These examples always use CST (UTC-6) and NST (UTC-3:30). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

CST is 2 hours and 30 minutes behind NST.

CST is US Central winter time (early November to mid-March). The rest of the year Chicago uses CDT (UTC-5), one hour later. For Central Time that follows daylight saving time, use CT to NST. For daylight-time examples, use CDT to NDT.

How the time difference changes

For most of the year, CDT is 2 hours and 30 minutes behind NDT. From Nov 1, 2026 to Mar 14, 2027, CST is 2 hours and 30 minutes behind NST. Briefly around clock changes, CDT is 1 hour and 30 minutes behind NST or CST is 3 hours and 30 minutes behind NDT.

For most of the year, working hours of 9:00 am to 6:00 pm in CDT correspond to 11:30 am to 8:30 pm in NDT. At other times of the year, working hours of 9:00 am to 6:00 pm in CST correspond to 11:30 am to 8:30 pm in NST.For most of the year, working hours of 09:00 to 18:00 in CDT correspond to 11:30 to 20:30 in NDT. At other times of the year, working hours of 09:00 to 18:00 in CST correspond to 11:30 to 20:30 in NST.

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

Time Difference

Central Daylight Time is 2 hours and 30 minutes behind Newfoundland Daylight Time.
7:00 am07:00 in CDT is 9:30 am09:30 in NDT

CDT to NDT call time
Best time for a conference call or a meeting is between 9am-3:30pm09:00-15:30 in CDT which corresponds to 11:30am-6pm11:30-18:00 in NDT

7:00 am07:00 Central Daylight Time (CDT). Offset UTC -5:00 hours
9:30 am09:30 Newfoundland Daylight Time (NDT). Offset UTC -2:30 hours

7:00 am07:00 CDT / 9:30 am09:30 NDT

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
CDT	NDT
	2:30am
	3:30am
	4:30am
	5:30am
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	7:30am
	8:30am
	9:30am
	10:30am
	11:30am
	12:30pm
	1:30pm
	2:30pm
	3:30pm
	4:30pm
	5:30pm
	6:30pm
	7:30pm
	8:30pm
	9:30pm
	10:30pm
	11:30pm
	12:30am next day
	1:30am next day
	02:30
	03:30
	04:30
	05:30
	06:30
	07:30
	08:30
	09:30
	10:30
	11:30
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	15:30
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	21:30
	22:30
	23:30
	00:30 next day
	01:30 next day

Central Standard Time

Offset: CST is 6 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Belize, Canada, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, United States

Principal Cities: The largest city in the CST time zone is Mexico City in Mexico, with about 12.294 million people. Other major cities in this time zone include Chicago, Houston, Puebla, Santiago de Querétaro.

French: HNC - Heure Normale du Centre

Spanish: CT - Tiempo Central Estándar, CT - Zona Centro

Map of the areas on Central Standard Time (CST) — CST all year CST part of the year
Today the lighter areas are on UTC−5 (Central Daylight Time).
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 Central Daylight Time (CDT).

End: Central Standard Time (CST) ended on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.

Start: Central Standard Time (CST) starts on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

See USA daylight saving time and upcoming clock changes worldwide.

CST representations, usage and related time zones

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

-06 - basic short
-0600 - basic
-06:00 - extended

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

-0600 - sign character (-) followed by a four digit time providing hours (06) and minutes (00) of the offset. Indicates an offset of six hours to the west of the zero meridian.

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

Sierra - Military abbreviation for CST
S - short form of 'Sierra'

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

America/Bahia_Banderas
America/Belize
America/Chicago
America/Chihuahua
America/Costa_Rica
America/El_Salvador
America/Guatemala
America/Indiana/Knox
America/Indiana/Tell_City
America/Knox_IN
America/Managua
America/Matamoros
America/Menominee
America/Merida
America/Mexico_City
America/Monterrey
America/North_Dakota/Beulah
America/North_Dakota/Center
America/North_Dakota/New_Salem
America/Ojinaga
America/Rainy_River
America/Rankin_Inlet
America/Regina
America/Resolute
America/Swift_Current
America/Tegucigalpa
America/Winnipeg
CST6CDT
Canada/Central
Canada/Saskatchewan
Mexico/General
US/Central
US/Indiana-Starke

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

Central Standard Time - UTC -6
China Standard Time - UTC +8
Cuba Standard Time - UTC -5

Time zones with the GMT -6 offset:

CST - Central Standard Time
CT - Central Time
MDT - Mountain Daylight Time
EAST - Easter Island Standard Time
GALT - Galapagos Time
S - Sierra Time Zone

Newfoundland Standard Time

Offset: NST is 3 hours and 30 minutes behind Greenwich Mean Time (GMT).

Countries using this time zone: Canada

Principal Cities: The largest city in the NST time zone is St. John's in Canada, with about 110,525 people. Other major cities in this time zone include Corner Brook, Grand Falls-Windsor, Gander, Clarenville.

French: HNT - Heure Normale de Terre-Neuve

Map of the areas on Newfoundland Standard Time (NST) — NST part of the year
Today the shaded areas are on UTC−2:30 (NDT).
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 Newfoundland Daylight Time (NDT).

End: Newfoundland Standard Time (NST) ended on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.

Start: Newfoundland Standard Time (NST) starts on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

See Canada daylight saving time and upcoming clock changes worldwide.

NST representations, usage and related time zones