Superbowl Sunday is always a party, but no one was celebrating the birthday of the national income tax. On February 3, 1913, the 16th Amendment was ratified and Sunday marked the 100th year of the national income tax.
The Confederacy and the Union had enacted national income taxes before, but none lasted. President William Howard Taft took office in 1909 and proposed an amendment to address the undertaxing of the rich and the overtaxing of the poor. The amendment passed right away but wasn't ratified until 1913.