Idaho real estate glossary

UTC vs. Mountain Time: Idaho Time Zone Guide

Mountain Time in Idaho fluctuates between two offsets from Coordinated Universal Time (UTC) due to Daylight Saving Time. As of November 9, 2026, the state is observing Mountain Standard Time (UTC-7).

Updated with grounded research as of 2026-11-09.

The short answer

The relationship between Mountain Time and Coordinated Universal Time (UTC) depends on whether Idaho is observing standard time or daylight saving time. Mountain Standard Time (MST) is UTC-7, while Mountain Daylight Time (MDT) shifts the offset to UTC-6. Because Idaho participates in daylight saving, the state's clocks 'fall back' or 'spring forward' annually, changing how many hours it trails behind UTC.

Key facts

Mountain Standard Time (MST)
UTC-7
Mountain Daylight Time (MDT)
UTC-6
Current Observation (Nov 9, 2026)
Mountain Standard Time (UTC-7)

Understanding the Time Shift

The 'Mountain Time' designation refers to a specific geographic zone that adjusts twice a year. During the summer months, Idaho moves to Mountain Daylight Time (MDT), reducing the gap between local time and UTC to six hours. Once daylight saving ends, the state transitions to Mountain Standard Time (MST), increasing the gap to seven hours.

  • MDT (Summer): UTC-6
  • MST (Winter): UTC-7

Regional Time Variations in Idaho

While the vast majority of Idaho observes Mountain Time, it is important for residents and those relocating to note that the state is not entirely uniform. The Idaho Panhandle, generally defined as the area north of the Salmon River, observes Pacific Time (PT). This means Northern Idaho is consistently one hour behind the rest of the state, regardless of whether standard or daylight saving time is in effect.

Daylight Saving Time Schedule

Idaho adheres to the federal schedule for Daylight Saving Time. As of November 2026, the state has already transitioned out of MDT. Clocks shifted back one hour on November 1, 2026, marking the return to MST. This cycle will repeat in the spring when clocks are moved forward to return to MDT.

  • Spring: Clocks move forward (MDT begins)
  • Fall: Clocks move back (MST begins)

Common questions

Does the entire state of Idaho use the same time zone?

No. Most of Idaho is in the Mountain Time Zone, but the northern portion (the Panhandle) operates on Pacific Time.

When does Idaho change its clocks?

Idaho follows the standard U.S. practice of changing clocks on the second Sunday in March (forward) and the first Sunday in November (back).

Related Idaho questions

  • Which Idaho counties are in the Pacific Time Zone?
  • How does Mountain Time compare to Pacific Time?
  • Are there proposals to eliminate Daylight Saving Time in Idaho?

Sources and verification