1. On April 9, 1889, the first land run in Oklahoma took place. Over 50,000 people gathered at the border of Indian Territory and Oklahoma Territory to stake their claim on available land.

2. On April 9, 1935, the infamous "Black Sunday" dust storm occurred. The severe dust storm affected several states, including Oklahoma, and caused severe damage to crops, livestock, and property.

3. Country music star and Oklahoma native, Merle Haggard, was born on April 9, 1937. Haggard is known for hits such as "Okie from Muskogee" and "The Fightin' Side of Me."

4. The Oklahoma City bombing occurred on April 19, 1995, but on April 9, 2001, the Oklahoma City National Memorial was opened to the public. The memorial honors the victims and survivors of the bombing.

5. On April 9, 2014, the Oklahoma House of Representatives passed a bill that made the watermelon the official state vegetable. This decision caused controversy as many argued that a watermelon is a fruit and not a vegetable.