Convert Central Standard Time to Central Daylight Time
Instantly convert Central Standard Time (CST) to Central Daylight Time (CDT) with our free online calculator.
Central Standard Time
11:20:55 PM
Tue, Jun 23 (CST)
Central Daylight Time
12:20:55 AM
Wed, Jun 24 (CDT)
Convert a Specific Time
24-Hour Comparison
| CST | CDT |
|---|---|
| 12:00 AM | 1:00 AM |
| 1:00 AM | 2:00 AM |
| 2:00 AM | 3:00 AM |
| 3:00 AM | 4:00 AM |
| 4:00 AM | 5:00 AM |
| 5:00 AM | 6:00 AM |
| 6:00 AM | 7:00 AM |
| 7:00 AM | 8:00 AM |
| 8:00 AM | 9:00 AM |
| 9:00 AM | 10:00 AM |
| 10:00 AM | 11:00 AM |
| 11:00 AM | 12:00 PM |
| 12:00 PM | 1:00 PM |
| 1:00 PM | 2:00 PM |
| 2:00 PM | 3:00 PM |
| 3:00 PM | 4:00 PM |
| 4:00 PM | 5:00 PM |
| 5:00 PM | 6:00 PM |
| 6:00 PM | 7:00 PM |
| 7:00 PM | 8:00 PM |
| 8:00 PM | 9:00 PM |
| 9:00 PM | 10:00 PM |
| 10:00 PM | 11:00 PM |
| 11:00 PM | 12:00 AM(+1d) |
How to Convert Central Standard Time to Central Daylight Time
Formula
To convert Central Standard Time (CST) to Central Daylight Time (CDT): Convert CST to CDT
About Central Standard Time (CST)
Central Standard Time (CST, IANA: America/Chicago, America/Mexico_City) is the time zone for the US Central region, central Mexico, and most of Central America, set at UTC-6:00. CST is the most populous US time zone by area covered and serves the Chicago-Dallas-Houston-Minneapolis corridor of ~80 million people across CST states (Texas, Illinois, Wisconsin, Minnesota, Iowa, Missouri, Arkansas, Louisiana, Mississippi, Alabama, Tennessee western, Kansas eastern, Nebraska eastern, Oklahoma, North Dakota, South Dakota, Kentucky western, Indiana western, Michigan UP, Florida panhandle) plus Mexico (Mexico City, Guadalajara, Monterrey since 2022 DST abolition), Honduras, Nicaragua, El Salvador, Costa Rica, Guatemala, Belize. CST observes DST (switching to CDT = UTC-5:00) per Energy Policy Act 2005 — except for Mexico nationally, which abolished DST in 2022 except for border zones aligning with US DST. CST affects: NYSE close at 15:00 CST, CME (Chicago Mercantile Exchange) commodity futures pit/electronic hours, Texas Medical Center coordinated patient handoffs.
About Central Daylight Time (CDT)
Central Daylight Time (CDT, IANA: America/Chicago during DST window) is the summer-time variant of CST, set at UTC-5:00 — observed from the second Sunday in March to the first Sunday in November per the US Energy Policy Act of 2005. CDT shares the same UTC offset as Eastern Standard Time (EST), so during winter months Chicago/Dallas are one hour behind New York/Atlanta, but during summer months Chicago/Dallas are still one hour behind because both regions advance equally for DST. The 'spring forward / fall back' transition affects an estimated 311 million US residents annually per Census data. CDT is used in 16 US states partially or fully (Illinois, Texas, Wisconsin, Minnesota, Iowa, Missouri, Arkansas, Louisiana, Mississippi, Alabama, Tennessee, Kansas, Nebraska, Oklahoma, North Dakota, South Dakota) and parts of Canada (Manitoba, western Ontario, Saskatchewan partial — Saskatchewan stays on CST year-round, an exception). Affects MLB season game scheduling, CME / CBOT commodity trading hours, and US-Canada-Mexico USMCA cross-border supply-chain handoffs.