1. On May 23, 1846, the Brown v. Board of Education landmark case occurred. The decision enabled black children in Louisiana to attend previously segregated schools.

2. The first Republican National Convention of Louisiana was held in New Orleans on May 23, 1866. The convention was one of the first movements towards diversity in the state's political scene.

3. In 1843, The Pelican, Louisiana's first daily newspaper, was printed for the first time. It was the precursor to The Times-Picayune and was published in New Orleans.

4. On May 23, 1844, a train derailment occurred on the Pontchartrain Railroad, resulting in the deaths of 29 passengers. It remains one of the deadliest train accidents in American history.

5. Louisiana Governor Jimmie Davis declared May 23 as "Mop-Up Day" in 1959, encouraging Louisianans to clean up and beautify their communities. This tradition continues today as "Mop-Up America," inspiring individuals nationwide to take part in community clean-up efforts.