Glendale, Arizona operates on Mountain Standard Time (MST) all year and does not observe daylight saving time. Because the local clocks never move forward or backward, the city's relationship with the rest of the United States shifts depending on the time of year.
During the winter months, Glendale matches Denver and the rest of the Mountain Time Zone. Once spring arrives and most of the country springs forward, Glendale stays put. As a result, its clocks align with Los Angeles and the Pacific Time Zone for roughly eight months of the year, even though its technical offset remains UTC-7.
Why Glendale Skips Daylight Saving Time
The decision to stay on standard time comes down to climate. In 1968, the Arizona legislature opted out of the Uniform Time Act to spare residents from excessive summer heat.
If the state observed daylight saving time, summer evenings would feature sunlight blazing down until nearly nine o'clock, forcing air conditioning units to run harder during the hottest hours of the day. Keeping standard time means the sun rises earlier on summer mornings, offering a brief window of manageable temperature before the peak heat sets in.
According to historical archives maintained by the National Institute of Standards and Technology, energy conservation and public comfort heavily influenced states that chose exemptions under federal law. Hawaii shares this year-round standard time approach for similar regional reasons, while the rest of the contiguous United States follows seasonal shifts tracked by Time and Date.
How Glendale's Time Compares Across the Country
Scheduling calls or virtual meetings with people in Glendale requires keeping track of seasonal shifts. Because the city stays stationary while other regions move, the time difference between Glendale and major hubs changes twice a year.
- Eastern Time: During winter, Glendale is three hours behind New York. In summer, when the East Coast springs forward, Glendale is four hours behind.
- Central Time: In winter, Glendale is two hours behind Chicago. In summer, the gap widens to three hours.
- Mountain Time: From November to March, Glendale matches Denver. From March to November, Denver moves to Mountain Daylight Time, making Glendale one hour behind Denver.
- Pacific Time: In winter, Glendale is one hour ahead of Los Angeles. In summer, Glendale matches Pacific Time, meaning it is the exact same time in Glendale and Los Angeles.
Common Scheduling Mistakes to Avoid
A frequent error involves recurring calendar invites set across state lines. If you set a weekly meeting with a team member in Glendale during January, a spring transition can make the meeting appear to shift by an hour if your software handles time zones automatically.
Another common pitfall involves assuming uniform rules across the entire state of Arizona. While Glendale and most of the state skip daylight saving time, the Navajo Nation in northeastern Arizona does observe it. Meanwhile, the Hopi Reservation—which is entirely enclosed by the Navajo Nation—follows state policy and stays on standard time. Travelers crossing that region can experience multiple time changes within a short drive.
Frequently Asked Questions
Does Glendale ever observe daylight saving time?
No. Glendale has kept Mountain Standard Time year-round since modern tracking began, and local clocks never change in March or November.
What UTC offset does Glendale use?
Glendale uses UTC-7 throughout the entire year. It does not switch to UTC-6 during the summer months.
Why does Glendale match Pacific Time in the summer?
Glendale stays on standard time while West Coast states adopt Pacific Daylight Time (UTC-8 shifts to UTC-7). Because both regions share a UTC-7 offset during those months, the clocks read the exact same hour.
Do surrounding cities in the Phoenix metro area follow the same rule?
Yes. Phoenix, Scottsdale, Mesa, Tempe, and all other municipalities in Maricopa County share Glendale's schedule and skip daylight saving time entirely.
