It’s made for an especially unique situation with the Hopi reservation, which is landlocked within the Navajo Nation and goes by standard time year-round. A stretch of U.S. 160 in Tuba City is the de …It’s made for an especially unique situation with the Hopi reservation, which is landlocked within the Navajo Nation and goes by standard time year-round. A stretch of U.S. 160 in Tuba City is the de …