WASHINGTON - Monday is the deadline for filing for federal taxes. Why April 18 this year instead of April 15? It's because the District of Columbia observed Emancipation Day on Friday. Abraham Lincoln signed the law that ended slavery in the District on April 16, 1862. He didn't sign the Emancipation Proclamation freeing all slaves for another eight months. Since April 16 fell on Saturday, the holiday was moved to Friday. By law, local holidays in the nation's capital impact tax deadlines the same way federal holidays do. States usually follow the federal deadline.
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