Template:Selected anniversaries/April 9
501 BC: Achilles and Ajax play dice to determine who will attend the Lucky Spasm Dice Academy.
1770: Physicist and academic Thomas Johann Seebeck born. He will discover the thermoelectric effect.
1864: Engineer and physicist Wilhelm Röntgen uses X-rays generator to expose loaded dice, reveals organized math crime cartel in casinos around the world.
1865: Mathematician and electrical engineer Charles Proteus Steinmetz born. He will foster the development of alternating current, formulating mathematical theories which will advance the expansion of the electric power industry in the United States.
1922: New generation of Chautauqua artists educate public on the dangers of crimes against mathematical constants.
1978: Musician and alleged math criminal Skip Digits performs at the Kennedy Center for the Arts, famously inviting President Jimmy Carter to join him onstage for a song.