The state of California began issuing marriage licenses to same-sex couples.
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Pepsi Cola became an official trademark.
The longest papal reign began when Pope Pius IX was elected.
The rules for the Grammy Awards were updated to restrict AI-generated songs.
Ghostbusters II was released in 2,410 movie theaters across the US.
IBM was founded as the Computing-Tabulating-Recording Company in Endicott, New York.
