1. Land Run of 1889: On April 30, 1889, a historic land run took place in Oklahoma Territory. Over 50,000 people lined up for their chance to claim a piece of land in the unassigned lands of the territory, resulting in the settlement of over 10,000 claims in a single day. This event marks the beginning of Oklahoma's statehood.

2. Tinker Air Force Base: On April 30, 1941, Tinker Air Force Base was established in Oklahoma City. The base is one of the largest military installations in the country and serves as a key component of the United States' national defense.

3. Oklahoma City Bombing: One of the darkest days in Oklahoma history occurred on April 30, 1995. The Oklahoma City bombing was a domestic terrorist attack against the Alfred P. Murrah Federal Building that killed 168 people and injured hundreds more. The attack remains one of the deadliest acts of terrorism on American soil.

4. First Black Governor: George Nigh was sworn in as Oklahoma's first black governor on April 30, 1979. Nigh served two separate terms as governor, from 1979-1987, and again from 1990-1995.

5. NBA Playoffs: On April 30, 2019, the Oklahoma City Thunder faced off against the Portland Trail Blazers in the first round of the NBA playoffs. Despite a valiant effort, the Thunder fell short in a dramatic game, ending their playoff run for the season.