What time zone is Colorado in?

Colorado is primarily in the Mountain Daylight Time zone (MDT), currently UTC−06:00.

Does Colorado observe daylight saving time?

Yes. In 2026, clocks go forward around March 8 and back around November 1.

Denver is the most populous city in Colorado.

§ 01United States · MDT

Colorado runs on Mountain Daylight Time (MDT), currently UTC−06:00. Its largest city is Denver.

§ 02Time zone & daylight saving

Time zone: Mountain Daylight Time (MDT)
UTC offset: UTC−06:00
Largest city: Denver
Daylight saving (2026): Yes. In 2026, clocks go forward around March 8 and back around November 1.

§ 03Time difference

New York−2 h

Chicago−1 h

Denversame

Los Angeles+1 h

London−7 h

Tokyo−15 h

Hours are Colorado’s current offset relative to each city, daylight saving included.

§ 04Cities in Colorado

United States

§ 05Frequently asked

What time zone is Colorado in?: Colorado is primarily in the Mountain Daylight Time zone (MDT), currently UTC−06:00.
Does Colorado observe daylight saving time?: Yes. In 2026, clocks go forward around March 8 and back around November 1.
What is the largest city in Colorado?: Denver is the most populous city in Colorado.