Good news for all the procrastinators out there: This year, federal taxes aren't due on April 15... they're due on April 18. Those extra three days may be especially helpful for some, considering two of those days fall on a weekend.
Why the extended deadline? D.C. Emancipation Day, a holiday that marks the anniversary of the abolition of slavery in Washington D.C., will be observed on the 15th. The holiday, which causes a shutdown of the government in D.C., is generally commemorated on April 16. But since it falls on a Saturday this year, celebrations have been moved to Friday, April 15, thus pushing Tax Day to the following business day—Monday, April 18. Residents of Massachusetts and Maine have an extra day on top of that to file their federal returns, thanks to Patriots Day; their due date is Tuesday, April 19.
States with the same deadline as the federal government are following suit with an April 18 deadline, but it's important to note that tax deadlines vary by state.