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CST is Central Standard Time. CDT is Central Daylight Time. CT is Connecticut, but some people mistakenly use it as an abbreviation for Central Time. Daylight Saving Time begins and ends on dates set by law. Nationally, in 2012, it begins on March 11 at 2:00am and ends on November 4 at 2:00am, but states and regions may or may not choose to go along, so it is very important to use the full three letter abbreviation. Use CST when referring to time in the central time zone when and where Daylight Saving Time is not in effect. Use CDT when referring to time in the central time zone when and where Daylight Saving Time is in effect. Use CT to refer to Connecticut, or any number of other things abbreviated CT, but NEVER to identify a time zone, unless your goal is to confuse people.

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12y ago
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5mo ago

Use CST (Central Standard Time) when referring to the time in the Central Time Zone when Daylight Saving Time is not in effect. Use CDT (Central Daylight Time) when Daylight Saving Time is in effect in the Central Time Zone. Use CT as a general abbreviation for Central Time without specifying whether it is standard or daylight time.

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13y ago

CDT means Central Daylight Time while CST means Central Standard Time. The difference is that CDT is used while Daylight savings is in effect, therefore in the summer. CST is used in the winter. In Canadian Providences Ontario (a few communities) and Saskatchewan (most), CST is used all year.

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13y ago

CDT is Central Daylight time - so in spring forward, 12:00 becomes 1:00.

MST is Mountain Standard time - which is one time zone earlier than Central, 12:00 becomes 11.

So the difference is 2 hours.

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15y ago

D is for Daylight Savings; S is for Standard (not Daylight Savings).

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11y ago

CDT = Central Daylight Time (summer, with daylight savings)

CST = Central Standard Time (winter, no daylight savings)

CT = Central Time (no reference to daylight savings)

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14y ago

One hour.

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Anonymous

Lvl 1
4y ago

Just to clarify CST or CDT or CT is acceptable. CT - central time zone is used when it is not know if the time zone being reference is using daily savings time - reference look up website timeanddate --> time zone

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Q: When to use CST or CDT or CT?
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Which states have parts in another time zone?

States of the United States that are in more than one time zone are, in alphabetical order,... Alaska (MeST, AKST/AKDT & HAST/HADT) Arizona - March to November only (MST & MST/MDT) Florida (EST/EDT & CST/CDT) Idaho (MST/MDT & PST/PDT) Indiana (EST/EDT & CST/CDT) Kansas (CST/CDT & MST/MDT) Kentucky (EST/EDT & CST/CDT) Michigan (EST/EDT & CST/CDT) Nebraska (CST/CDT & MST/MDT) Nevada (MST/MDT & PST/PDT) North Dakota (CST/CDT & MST/MDT) Oregon (MST/MDT & PST/PDT) South Dakota (CST/CDT & MST/MDT) Tennessee (EST/EDT & CST/CDT) Texas (CST/CDT & MST/MDT)


WHAT IS 1159 PM CT IN EST TIME?

11:59 PM CST = 12:59 AM EST11:59 PM CDT = 11:59 PM ESTExample: During the summer, the time is the same in Chicago (CDT) and Jamaica (EST).


What time was it in Chicago 1957 August 22 CDT or CST?

In 1957, Chicago would have been observing Central Daylight Time (CDT) on August 22nd. Chicago typically transitions to Central Standard Time (CST) in the fall.


When to use cst or cdt in IL?

Central Standard Time (CST) is used in Illinois from the first Sunday in November to the second Sunday in March. Central Daylight Time (CDT) is used from the second Sunday in March to the first Sunday in November. This change corresponds with the daylight saving time periods in Illinois.


What time zone is Katy Texas?

From 2 AM CDT (7 AM UTC) on the 1st Sunday of November until 2 AM CST (8 AM UTC) on the 2nd Sunday of March, the time in Katy is UTC-6 (Central Standard Time or CST). During the rest of the year, the time in Katy is UTC-5 (Central Daylight Saving Time or CDT).

Related questions

Which states have parts in another time zone?

States of the United States that are in more than one time zone are, in alphabetical order,... Alaska (MeST, AKST/AKDT & HAST/HADT) Arizona - March to November only (MST & MST/MDT) Florida (EST/EDT & CST/CDT) Idaho (MST/MDT & PST/PDT) Indiana (EST/EDT & CST/CDT) Kansas (CST/CDT & MST/MDT) Kentucky (EST/EDT & CST/CDT) Michigan (EST/EDT & CST/CDT) Nebraska (CST/CDT & MST/MDT) Nevada (MST/MDT & PST/PDT) North Dakota (CST/CDT & MST/MDT) Oregon (MST/MDT & PST/PDT) South Dakota (CST/CDT & MST/MDT) Tennessee (EST/EDT & CST/CDT) Texas (CST/CDT & MST/MDT)


WHAT IS 1159 PM CT IN EST TIME?

11:59 PM CST = 12:59 AM EST11:59 PM CDT = 11:59 PM ESTExample: During the summer, the time is the same in Chicago (CDT) and Jamaica (EST).


What is the Indian time if cst is 11.00am?

wHAT IS 11.00AM cdt


What time was it in Chicago 1957 August 22 CDT or CST?

In 1957, Chicago would have been observing Central Daylight Time (CDT) on August 22nd. Chicago typically transitions to Central Standard Time (CST) in the fall.


When to use cst or cdt in IL?

Central Standard Time (CST) is used in Illinois from the first Sunday in November to the second Sunday in March. Central Daylight Time (CDT) is used from the second Sunday in March to the first Sunday in November. This change corresponds with the daylight saving time periods in Illinois.


What time zone is Katy Texas?

From 2 AM CDT (7 AM UTC) on the 1st Sunday of November until 2 AM CST (8 AM UTC) on the 2nd Sunday of March, the time in Katy is UTC-6 (Central Standard Time or CST). During the rest of the year, the time in Katy is UTC-5 (Central Daylight Saving Time or CDT).


What is the equivalent CDT to GMT?

Its GMT -5 hrs. CDT = GMT-5 hrs (i.e. if its 18:00 hrs @ GMT then it would be 13:00 hrs @ CDT) CDT stands for Central Daylight Time. Its basically Daylight Saving Time (DST) for Central Time (CT) which is applicable or get activated during summers only. You can say that CDT is the summer time zone for CT. Normally CT is GMT-6 hrs but due to this daylight saving it becomes DST @ GMT-5 with the saving of 1 hr. After the Summer months Central Time is shifted back by 1 hour to US Central Standard Time (CST) or (GMT-6). Regards Chander Sangra


Is Adelaide belong in CST zone?

Yes, Adelaide is in CST/CDT (the part of the Central Time Zone that observes Summer Time from October 'til April).


What time was it in Chicago August 15 1957 - CDT or CST?

Chicago was on Central Daylight Saving Time (CDT) 28 April 1957 - 27 October 1957.


What time in the Philippines is 1pm US CST?

3 am PHT (Reminder: There is no part of the U. S. that uses CST between March and November. CST is the same as MDT, which is used in the U. S. during that time, and areas that are in CST during the winter are in CDT in spring & summer. CDT is an hour closer to Philippine Time than CST.)


How many hours difference is CDT to EDT?

Mountain Daylight Time (MDT) is 1 hour ahead of Mountain Standard Time (MST). Central Standard Time (CST) is 1 hour ahead of Mountain Standard Time (MST). So CST would be the same time as MDT. However, This would only occur for 1 hour during Autumn when CDT falls back to CST and MDT hasn't yet fallen back to MST.


What time is 930 in central time in the eastern time zone?

In North America,0930 EST = 0830 CST = 0930 CDT = 1030 EDT, and0930 EDT = 0730 CST = 0830 CDT = 0830 EST.In Australia,0930 EST = 0900 CST = 1000 CDT = 1030 EDT, and0930 EDT = 0800 CST = 0830 EST = 0900 CDT.Examples:In June, when it's 0930 EDT in New York, it's 0830 EST in Jamaica, 0830 CDT in Chicago, and 0730 CST in Guatemala.In December, when it's 0930 EDT in Sydney, it's 0900 CDT in Adelaide, 0830 EST in Brisbane, and 0800 CST in Darwin.