Daylight savings time is very important. The U.S established daylight-saving time to conserve electricity in World War 1. Arizona and Hawaii are the states that do not observe daylight savings time. In 1966, the Uniform Time Act was adopted by the Congress which established Uniform daylight saving in the whole country but the decision to use it was left upon the local jurisdictions. With Arizona going on with daylight saving time, after trying for a year there was a negative reaction.

The state legislature then asked for an exemption with a positive approval. Thus, Arizona is on Mountain Standard Time the whole year since then, about forty years ago. It was a time when people wanted less sweltering daylight. Very few had air-conditioning. A huge number of people worked in agriculture when they spent time outside only. But today Arizona is one of the fastest-growing states. Its time when Arizona should consider being uniform with other parts of the country.

During the daylight saving time, the time of Arizona is same as that of California which is the Pacific Daylight Time. The Daylight Savings Time ends on Novembers first Sunday. The people in the rest of the country set their clock back by one hour. This is however not done in Arizona. Thus, till second Sunday of March, when the daylight saving time ends, people of Arizona are one hour ahead of the states with Pacific Standard Time; one hour behind than the states with Central Time Zone and two hours behind than the states which are on Eastern Time. The only exception in northeastern Arizona, which observes the daylight saving time, is the Navajo Nation.