Denver is on the same time as Phoenix in winter and 1 hour ahead in summer. Updated for the 2026 time zone changes and current daylight saving rules.
| Starting | Denver is | Phoenix / Denver |
|---|---|---|
| Nov 1, 2026 | same time | UTC−7 / UTC−7 |
| Mar 14, 2027 Denver springs forward | 1 hour ahead | UTC−7 / UTC−6 |
| Nov 7, 2027 Denver falls back | same time | UTC−7 / UTC−7 |
Mountain Standard Time. UTC−7 all year. Arizona doesn't use daylight saving time.
Mountain Time. UTC−7 in winter and UTC−6 from the second Sunday in March to the first Sunday in November.
Winter: A 9-to-5 workday overlaps for the full 8 hours: 9:00 AM to 5:00 PM in Phoenix, which is 9:00 AM to 5:00 PM in Denver.
Summer: A 9-to-5 workday overlaps for 7 hours: 9:00 AM to 4:00 PM in Phoenix, which is 10:00 AM to 5:00 PM in Denver.
Arizona doesn't use daylight saving time, so Phoenix stays at UTC−7 all year. It matches Los Angeles in summer and Denver in winter.
Denver is on the same time as Phoenix in winter and 1 hour ahead in summer.
Phoenix uses Mountain Standard Time: UTC−7 all year. Arizona doesn't use daylight saving time. Denver uses Mountain Time: UTC−7 in winter and UTC−6 from the second Sunday in March to the first Sunday in November.
In winter: A 9-to-5 workday overlaps for the full 8 hours: 9:00 AM to 5:00 PM in Phoenix, which is 9:00 AM to 5:00 PM in Denver. In summer: A 9-to-5 workday overlaps for 7 hours: 9:00 AM to 4:00 PM in Phoenix, which is 10:00 AM to 5:00 PM in Denver.
Arizona doesn't use daylight saving time, so Phoenix stays at UTC−7 all year. It matches Los Angeles in summer and Denver in winter.