Tax Day falls on April 18, 2017. That's the deadline for filing taxes on income earned in 2016. Usually, April 15 is the day taxes are due, but in 2017, that falls on a Saturday. And on Monday, the District of Columbia celebrates Emancipation Day, which is normally April 16, but that's a Sunday. Emancipation Day affects taxes the same way federal holidays do. Therefore, the tax deadline is pushed out to the following Tuesday, April 18, giving taxpayers three extra days to file their returns.Silly me, I thought it was because of Patriots' Day. It used to be that Patriots' Day sometimes gave a one-day extension to those who lived in Massachusetts or Maine, or those who sent their returns to IRS offices there, but I gather that no longer is true.