Why Tax Day won't be April 15 in 2011

If you're one of the hundreds of thousands of taxpayers who wait until the last minute to file your taxes, make a note: The IRS has just announced that the due date for 2010 individual federal income tax returns will be Monday, April 18, 2011.

Traditionally, Tax Day falls on April 15 unless that day happens to be on a Saturday, Sunday or federal holiday. In 2011, April 15 meets none of those criteria -- it falls on a Friday, and there's no federal holiday that day.