April 15th of each year is National Tax Day. In the United States, the term “tax day” refers to the day on which individual income tax returns are due to the federal government. The day may also refer to April 15th for state tax returns.
The Federal income tax filing deadline is midnight on April 15th of every year, with extensions occurring when the 15th lands on a Saturday, Sunday, or a holiday. In those circumstances, the returns are due the first succeeding day that is not a Saturday, Sunday, or a holiday.
These dates can differ depending on the residence as well. Some years, due to extenuating circumstances such as natural disasters, more significant extensions have been granted by the Federal Government.