1. In 1867, Nebraska became a state on August 15th. This day is considered as Nebraska's birthday, and it is celebrated as a state holiday.

2. In 1936, the first ever Nebraska State Fair was held on August 15th. The fair was organized to showcase the state's agricultural products and has since become an annual event, drawing thousands of visitors from all over the country.

3. In 1969, the University of Nebraska-Lincoln opened its first African-American studies center on August 15th. The center was established to promote the study of African-American history and culture, and to encourage greater understanding and appreciation of this important part of Nebraska's heritage.

4. In 1971, Nebraska's first female governor, Kay Orr, was born on August 15th. Orr was elected in 1986 and served as governor for two terms from 1987 to 1991. She remains one of the state's most popular and respected politicians.

5. In 2017, a total solar eclipse passed across Nebraska on August 15th. This rare celestial event was witnessed by millions of people across the state and was considered as one of the most awe-inspiring astronomical spectacles of recent times.