April of every year in the United States it's the same thing: people scrambling to file their taxes before the April 15th deadline. Everybody knows the IRS, few love them, but they perform an essential role in the collection of money for the government. Although the idea of an income tax dates back to the Civil War, the IRS itself is largely a modern institution with modern responsibilities.
http://blogs.trb.com/news/local/longisland/politics/blog/2008/03/flashback_hrc_once_thought_tax.html
eHow Article: About the Internal Revenue Service