...............Income taxes aren't due until Monday the 18th! Why you ask? The answer is simple. The deadline to file federal taxes is on Monday, April 18, this year because the Internal Revenue Service’s District of Columbia offices will be closed on Friday, April 15, in observance of the locally recognized Emancipation Day. The D.C. public holiday technically falls on Saturday, April 16, but is observed by the government on the closest weekday when it falls on a weekend.