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Please excuse our site and file changes as we transition to Secretary Fontes.

Daylight Saving Time

Time Zone

Arizona is on Mountain Standard Time. Arizona does not observe Daylight Saving Time, with the exception of the Navajo Nation. Arizona previously observed Daylight Saving Time beginning in 1918, but made the permanent change to Standard time in 1968.

Time zones in the United States developed in the mid-nineteenth century to accommodate railroad schedules, which required standardizing time across the nation. Before the adoption of time zones, local communities each observed their own time schedules.

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  • Digital Arizona Library (DAZL)
    • Resources for Learners
      • Elementary Students
      • High School and Junior High
      • Research Topics
    • Arizona Almanac
      • Arizona Constitution
      • Arizona's Chronology
      • Daylight Saving Time
      • State Song
      • State Symbols
      • The 5 C's
      • The Meaning of Arizona
    • Reading Arizona eBooks
    • Arizona Maps Online
    • Arizona Government
      • State Agency Histories
      • Historic Election Materials
      • Documents Leading to Statehood
      • Historic Arizona Legislatures
    • Arizona Historic Digital Newspapers
    • Arizona Memory Project
    • Arizona Research Topics
    • Online Reference Resources
  • Arizona State Knowledge (ASK)
  • Arizona Talking Book Library Online Catalog
  • Braille and Audio Reading Download
  • Research Library Catalog

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This project is supported by the Arizona State Library, Archives & Public Records, a division of the Secretary of State, with federal funds from the Institute of Museum and Library Services.

 

 

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