Cartoon by Whitney Potter: Taxes and the I.R.S. Helpline

"While the tax return due date is typically April 15, this year your return is due by Tuesday, April 18.

"Why? When April 15 falls on a weekend, the filing deadline is scheduled for the following Monday, unless that Monday happens to be a holiday. This year, Monday, April 17, is Emancipation Day, which is a legal holiday in the District of Columbia. (That day celebrates President Lincoln's signing of the Compensated Emancipation Act in 1862, which freed over 3,000 slaves in D.C.)"

--From Money.CNN.com