Native American tribes in Nebraska in Macy, with the Winnebago Tribal Council in nearby Winnebago. The offices of the Ponca Tribe of Nebraska and the Santee Sioux Tribal Council offices are in Niobrara. The Bureau of Indian Affairs office serving Nebraska is located in Aberdeen, South Dakota, while the Winnebago Agency office serves the Omaha and Winnebago. Native American tribes in Nebraska Native American tribes in the U.S. state of Nebraska have been Plains Indians, descendants of succeeding cultures of indigenous peoples who have occupied the area for thousands of years. More than 15 historic tribes have been identified as having lived in, hunted in,
Native American Day 1998, the California Assembly passed AB 1953, which made Native American Day an official state holiday, observed annually on the fourth Friday in September. In 1997, the state of Nevada also declared the Fourth Friday of September as [Nevada Indian] Native American Day. In 1989, the South Dakota legislature unanimously passed legislation proposed by Governor George S. Mickelson to proclaim 1990 as the "Year of Reconciliation" between Native Americans and whites, to change Columbus Day to Native American Day and to make Martin Luther King's birthday into a state holiday. Since 1990, the second Monday in October has been celebrated