Presidents' Day

Also known as Washington's Birthday is a United States federal holiday celebrated on the third Monday of February, meaning it can occur the 15th through the 21st inclusive, in honor of George Washington, the first President of the United States, who was born on February 22, 1732. Colloquially, it is widely known as Presidents Day and is often an occasion to remember all the presidents, not just George Washington or Abraham Lincoln, whose birthday is also in February.The term "Presidents Day" was coined in a deliberate attempt to change the holiday into one honoring multiple presidents.

Official State Holidays
The day is also a state holiday in most states with official names including Presidents' Day, President's Day and Washington's and Lincoln's Birthday. Depending upon the specific law, the state holiday might celebrate officially Washington alone, Washington and Lincoln, or some other combination of U.S. presidents (such as Washington and the third president Thomas Jefferson, who was instead born in April)

Although Lincoln's birthday, February 12, was never a federal holiday, nearly half of the state governments have officially renamed their Washington's Birthday observances as "Presidents' Day", "Washington and Lincoln Day", or other such designations

Observance and Traditions
Today, the February holiday has become well known for being a day in which many stores, especially car dealers, hold sales. Until the late 1980s, corporate businesses generally closed on this day, similar to present corporate practices on Memorial Day or Christmas Day. With the late 1980s advertising push to rename the holiday, more and more businesses are staying open on the holiday each year, and, as on Martin Luther King Jr. Day, Veterans Day and Columbus Day, most delivery services outside of the U.S. Postal Service now offer regular service on the day as well. Some public transit systems have also gone to regular schedules on the day. Many colleges and universities hold regular classes and operations on Presidents' Day.
Consequently, some schools, which used to close for a single day for both Lincoln's and Washington's birthday, now often close for the entire week (beginning with the Monday holiday) as a "mid-winter recess". For example, the New York City school district began doing so in the 1990s.

taken from:

https://en.wikipedia.org/wiki/Washington%27s_Birthday