1. On April 4, 1877, " Wild Bill" Hickok was shot and killed while playing poker in Deadwood, South Dakota. He was holding a pair of aces and a pair of eights, now known as the "dead man's hand."

2. In 1949, the South Dakota Legislature passed a resolution creating a state flag, featuring the state seal on a blue background. The flag was officially adopted on April 4 of that year.

3. April 4, 1978, saw the opening of the Black Hills Passion Play in Spearfish, South Dakota. The play, which portrays the life and death of Jesus Christ, is performed by over 200 local actors and has been a popular attraction for over 40 years.

4. In 2000, South Dakota Governor Bill Janklow signed a bill designating the western spotted skunk as the official state mammal. The tiny nocturnal creature is known for its unique defense mechanism of performing handstands and squirting an unpleasant-smelling spray.

5. On April 4, 2014, President Barack Obama signed into law the "Agricultural Act of 2014," commonly known as the Farm Bill. The bill authorized funding for various agricultural programs, including crop insurance, rural development, and nutrition assistance. South Dakota is a major producer of wheat, corn, soybeans, and cattle, making the Farm Bill an important piece of legislation for the state's economy.