Phoenix Time
Live local time in Phoenix, Arizona (America/Phoenix). Free online tool — no sign-up. Clear formulas and worked examples. Runs locally in your browser.
Trust summary Engine tested · Specification checked · v1.0.1
- Input interpretation
- Enter values to calculate.
- Result
- —
- Model
- Current local date and time in the America/Phoenix time zone (Phoenix / Arizona MST, no DST).
- Scope
- Device clock and OS timezone database are reasonably correct.
- Verification
- Engine tested · Specification checked · v1.0.1
- Named expert review
- Optional · Not performed
- Specification basis
- IANA time zone database — America/Phoenix
- Arizona Mountain Standard Time UTC−7 year-round
- Most of Arizona does not observe Daylight Saving Time
Formulas
Core equations used by this calculator.
How to use
Open the live clock
The page shows current date and time for America/Phoenix from your browser.
Refresh if needed
Use Refresh to re-read the clock; the display also updates about once per second.
Plan with a fixed offset
Phoenix stays on MST (UTC−7) all year — only the other city’s DST can change the difference.
Example calculations
Common configurations with formula and result.
Noon UTC
MST = UTC−7
vs Denver in winter
Both on MST
vs Denver in summer
Denver on MDT
vs Los Angeles in summer
Both UTC−7
Phoenix vs other U.S. zones
Common values at a glance.
| City / zone | Their offset (winter / summer) | Phoenix relative |
|---|---|---|
| Denver (MST / MDT) | UTC−7 / UTC−6 | Same in winter; 1 h behind in summer |
| Los Angeles (PST / PDT) | UTC−8 / UTC−7 | 1 h ahead in winter; same in summer |
| Chicago (CST / CDT) | UTC−6 / UTC−5 | 1 h behind in winter; 2 h behind in summer |
| New York (EST / EDT) | UTC−5 / UTC−4 | 2 h behind in winter; 3 h behind in summer |
| Honolulu (HST) | UTC−10 | Always 3 hours ahead |
| UTC | UTC+0 | Always 7 hours behind |
Phoenix Time specification
Version 1.0.1 · Engine tested
- Engine tested 3 published cases
- Named expert review Not performed
- Calculation version 1.0.1
- Definition
- Phoenix and most of Arizona use Mountain Standard Time (MST, UTC−07:00) on the IANA zone America/Phoenix year-round. Unlike Denver and other Mountain Time cities, most of Arizona does not observe Daylight Saving Time.
- What it calculates
- Current local date and time in the America/Phoenix time zone (Phoenix / Arizona MST, no DST).
- Inputs
- None — uses the device clock and the IANA zone America/Phoenix
- Outputs
- Local time (24-hour style from the browser formatter)
- Local calendar date
- Formula
Display = Intl.DateTimeFormat with timeZone America/Phoenix- Assumptions
- Device clock and OS timezone database are reasonably correct.
- Covers Phoenix and most of Arizona; not the Navajo Nation DST area.
- Runs locally in the browser; no server round-trip for the clock.
- Units
- Civil local time (hours, minutes, seconds)
- UTC offset MST −7 (fixed)
- Boundary conditions
- No DST transitions — every civil hour occurs once per day
- Difference to DST-observing cities changes when those cities change clocks
- Example
- 12:00 UTC → 05:00 America/Phoenix
- Validation cases
3 published on this page
- UTC 12:00 → 05:00 America/Phoenix
- Same instant as America/Denver in winter → Identical clock time
- Same instant as America/Denver in summer → Phoenix is 1 hour earlier
- Specification basis
- IANA time zone database — America/Phoenix
- Arizona Mountain Standard Time UTC−7 year-round
- Most of Arizona does not observe Daylight Saving Time
- Calculation version
- 1.0.1
Background
Interpretation and common distinctions.
Current time in Phoenix, Arizona
This page shows a live local clock for Phoenix, using the IANA zone America/Phoenix. Time is read from your browser with that zone applied — Mountain Standard Time all year, with no spring-forward or fall-back.
Mountain Standard Time (no DST)
| Name | Abbreviation | UTC offset | DST |
|---|---|---|---|
| Mountain Standard Time | MST | UTC−7 | None |
Prefer UTC−7 or America/Phoenix when precision matters: “MST” alone can also mean Denver’s winter offset, which later switches to MDT.
Why Arizona is different
Most of the Mountain Time Zone (Denver) observes U.S. Daylight Saving Time. Most of Arizona does not, so Phoenix stays on UTC−7 while Denver moves to UTC−6 in summer. The Navajo Nation in northeastern Arizona is the main exception and does observe DST.
How Phoenix time compares
- Denver: same in winter; Phoenix is 1 hour behind in summer.
- Los Angeles: Phoenix is 1 hour ahead in winter; same in summer.
- Chicago: Phoenix is 1 hour behind in winter, 2 hours behind in summer.
- New York: Phoenix is 2 hours behind in winter, 3 hours behind in summer.
- Honolulu: Phoenix is always 3 hours ahead.
- UTC: Phoenix is always 7 hours behind.
UTC vs GMT
For everyday scheduling, UTC and GMT both mean offset +0. Example: noon UTC is 05:00 in Phoenix.
Related tools
Other calculators in this family: Denver Time, Los Angeles Time, Chicago / Central Time, New York Time, Hawaii Time, UTC Time .
Frequently asked questions
Key distinctions behind the calculation.
What time zone is Phoenix in?
Phoenix uses Mountain Standard Time (MST) year-round. The IANA identifier is America/Phoenix. The offset is UTC−7 with no daylight-time abbreviation.
Does Arizona observe Daylight Saving Time?
Most of Arizona does not. Phoenix never springs forward or falls back. The Navajo Nation in northeastern Arizona does observe DST.
Why is Phoenix sometimes the same as Los Angeles and sometimes not?
Phoenix is fixed at UTC−7. Los Angeles is UTC−8 in winter (so Phoenix is 1 hour ahead) and UTC−7 in summer (same time).
How does Phoenix compare to Denver?
Same time in winter (both MST). In summer Denver switches to MDT (UTC−6), so Phoenix is one hour behind.
Why use America/Phoenix instead of “MST”?
“MST” can mean Denver’s winter time or Arizona’s year-round time. America/Phoenix always means the no-DST Arizona offset.
What is UTC?
Coordinated Universal Time (UTC) is the global time standard. Phoenix is always UTC−7.