Why is Tax Day on April 18?

Every year it happens: People wake up on April 15 in a panic because they haven’t filed their taxes. They rush through the process and hurry to submit the paperwork at the last minute … until they realize they really have three extra days.

That’s right, Tax Day is actually April 18 this year, even though April 15 is a weekday. For all the contempt most of the country holds for Washington, D.C., you can thank the city government for your extra time.