who observes daylight savings
â¢ Daylight saving was ostensibly started to save energy, but it turned out people enjoyed having an extra hour of daylight after work. But not in Arizona, where sunlight only extends the heat-related misery. â¢ The Navajo Reservation observes daylight saving time, the Hopi Reservation does not. The Navajo Reservation surrounds the Hopi Reservation, so if on Monday you drive from Flagstaff to Gallup through Tuba City and Ganado, you'll change time on four occasions.