Washington's Birthday is a federal holiday celebrated in the United States on the third Monday of February. It is in honor of George Washington, the first US President. Washington's Birthday is also referred to as "Presidents' Day." This year, it is celebrated on Monday, February 17th.
Washington's Birthday is a legal federal holiday, and as a result, non-essential governmental offices are closed and all federal employees are paid for the holiday.
Private sector employers are not required to pay employees extra (over and above your normal rate of pay) for working on a holiday unless you have a contract that stipulates holiday pay. Employers may designate holidays as paid time off, however they aren't required to give you the holiday off from work.