What is the difference between CDT and UTC?
CDT is 5 hours behind UTC. CDT (Central Daylight Time) is used during Daylight Saving Time in the Central time zone, typically from March to November.
UTC time
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CDT
Central Daylight Time
17 Dec 2025
Frequently Asked Questions
Does this area observe DST?
CDT itself is the daylight saving time version of CST. CDT is observed from the second Sunday in March to the first Sunday in November, when the region switches back to CST (Central Standard Time, UTC-6:00).
Which major cities follow this pattern?
Cities such as Chicago, Houston, Dallas, Minneapolis, and New Orleans follow CDT during the summer months.
What areas share the same hours?
Parts of the central United States (Texas, Illinois, Missouri, Wisconsin, and many other states) and Canada (Manitoba, parts of Ontario) observe CDT during daylight saving time.
How does this compare with CST?
CDT is 1 hour ahead of CST. CDT (UTC-5:00) is used during summer months, while CST (UTC-6:00) is used during winter months.
Why does this area observe DST?
Daylight saving time is observed to make better use of daylight during the longer summer days, potentially reducing energy consumption and allowing for more evening activities.
How did this system get established?
CDT was established as part of the daylight saving time system adopted in the United States and Canada, beginning in the early 20th century to conserve energy during World War I.
What are the typical work hours here?
Work hours in areas following CDT are generally from 8:00 AM to 5:00 PM, with a lunch break in the middle of the day.
What is the economic importance of this area?
The Central region includes major economic hubs like Chicago (finance and transportation), Houston (energy), and Dallas (technology), making it a crucial part of the North American economy.