If you haven't filed your taxes yet, today is the last day to do so without paying a penalty, or getting an extension from the Internal Revenue Service

 According to Fortune Magazine, Congress passed the Sixteenth Amendment to the Constitution, which allows for implementation of personal income tax on February 3, 1913, and chose march 1 of the following year as the filing deadline. The deadline was changed to March 15 in 1918. It was changed to April 15 in 1955. Moving back the date from the end of the tax year served two purposes — it gave the IRS more time to handle the work and, more importantly, more time to hang on to your money before issuing a refund.