This year you will have three extra days to file your 2016 returns. The deadline, this year, is Tuesday, April 18, 2017. That’s because of the combined impact of the weekend and a holiday in the District of Columbia. The usual April 15 deadline falls on Saturday this year, which would normally have given you until at least the following Monday. But Emancipation Day, a D.C. holiday, is observed on Monday, April 17 and so taxpayers across the nation will have an additional day. By law, D.C. holidays affect tax deadlines for everyone in the same way federal holidays do.