CST to MST

On Tuesday 6 October 2026, Denver is 1 hour behind Chicago. Chicago is on CDT, and Denver is on MDT. So 9:00 AM CDT in Chicago is 8:00 AM MDT in Denver.

CST and MST are the winter names. Both places keep summer time until Sunday 1 November 2026.

In Denver

8:00 AM

Tuesday 6 October 2026MDT

9:00 AM CDT in Chicago on Tuesday 6 October 2026 is 8:00 AM MDT in Denver the same day.

Denver is 1 hour behind Chicago on this date.

From Sunday 1 November 2026, Denver and Chicago show the same time.

Hours in Chicago and Denver

Hours in Chicago and Denver
ChicagoDenver
6:00 AM CDT5:00 AM MDT
9:00 AM CDT8:00 AM MDT
12:00 PM CDT11:00 AM MDT
3:00 PM CDT2:00 PM MDT
6:00 PM CDT5:00 PM MDT
9:00 PM CDT8:00 PM MDT

Arizona

Arizona stays on MST all year, so it has a table of its own.

Phoenix is 2 hours behind Chicago.

Phoenix is 1 hour behind Denver until Sunday 1 November 2026.

Hours in Chicago and Phoenix
ChicagoPhoenix
6:00 AM CDT4:00 AM MST
9:00 AM CDT7:00 AM MST
12:00 PM CDT10:00 AM MST
3:00 PM CDT1:00 PM MST
6:00 PM CDT4:00 PM MST
9:00 PM CDT7:00 PM MST

When the gap changes

Chicago and Denver change their clocks on the same nights, so the gap stays the same all year.

More conversions