CST to CDT Time Converter
Central Daylight Time (CDT) is currently 1 hour ahead of Central Standard Time (CST). CST is UTC-6 and CDT is UTC-5. The table below converts every hour of the day between the two, and the call planner shows where working hours line up.
Best Time for a Call
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 4:00 PM in CST, which is 10:00 AM to 5:00 PM in CDT.
Comparing more than two places? The Overlap Zones tool shows working hours for several cities on one grid.
Hour by Hour: CST to CDT
Rows marked office hours fall between 9:00 AM and 5:00 PM in both places. For a specific date, use the interactive converter.
Does the Difference Change During the Year?
CST and CDT are fixed offsets, so the difference between them never changes.
This page covers North American Central Standard Time, UTC-6. The region switches to CDT (UTC-5) in summer. CST can also refer to China Standard Time, which is UTC+8.
CDT is UTC-5, the summer counterpart of CST. Central North America uses it from March to November.
Frequently Asked Questions
How many hours ahead is CDT compared to CST?
CDT is currently 1 hour ahead of CST. CST and CDT are fixed offsets, so the difference between them never changes.
What time is 9:00 AM in CST in CDT?
9:00 AM in CST is 10:00 AM in CDT.
What is the best time for a call between CST and CDT?
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 4:00 PM in CST, which is 10:00 AM to 5:00 PM in CDT.