Washington’s Birthday, commonly known as Presidents Day, is celebrated each year on the third Monday in February. Since it’s a federal holiday, most federal government employees won’t be required to come to work and that includes some that work for the United States Postal Service.

Traditionally, post offices are closed on federal holidays, but on Monday, some locations will open for retail transactions. People looking to conduct business at the post office should check their local location for operating hours.

Don’t expect a late arrival of a belated Valentine’s Day card to turn up in your mailbox, though, because there won’t be mail delivery on Monday, except for Express Mail and some package delivery in select areas. Normal operations will resume on Tuesday.

If there is some urgent mailing that needs to be done, people can take advantage of the services at UPS and FedEx. Presidents Day isn’t a holiday for UPS, according to company’s schedule, and all FedEx services except Smartpost and Express will operate normally.

Although widely known as Presidents Day, the holiday is officially called Washington’s Birthday and was created to celebrate George Washington, who was born on February 22. To honor America’s first president, it’s a tradition for a member of the Senate to read Washington’s 7,641-word farewell address and then inscribe his or her name and some brief remarks in a leather-bound book, according to the Senate.

This tradition began in 1888 when Senator John Ingalls read the address and last year, Senator Deb Fischer had the responsibility.

“Without the courage of his convictions and his leadership that defined our national ambition, our newly formed nation may have failed,” Fischer wrote in the book, according to the Omaha World-Herald. “Washington’s letter to friends and citizens revealed he had no hunger for personal power. His love was with the people and he put his trust in the new republic. He will forever be ‘First in war, first in peace, and first in the hearts of his countrymen.’ What an honor it is to stand in this hallowed chamber and read Washington’s parting words once more.”

The holiday was initially celebrated on February 22 but was moved to the third Monday in February after the Uniform Holiday Act passed in 1968. There was a proposal to change the name to Presidents Day, but it never became official.