Pascua Florida Day is Florida's state day, celebrated on April 2, commemorating the discovery of Florida in 1513 by Spanish explorer Juan Ponce de Le?n. He named the land 'Pascua Florida' likely because the date was near Easter.

National Tartan Day honors the contributions of Scottish-Americans to the United States. It is observed annually on April 6, the anniversary of the Declaration of Arbroath.

Observed on the Tuesday of National Library Week, National Library Workers' Day honors librarians and library staff for their contributions to the community.

Passover Eve marks the beginning of Passover, a significant Jewish festival commemorating the liberation of the Israelites from Egyptian slavery. It begins at sundown on the 15th day of Nisan in the Hebrew calendar.

Honoring the third President of the United States and the principal author of the Declaration of Independence, Thomas Jefferson's Birthday is observed on April 13.

Father Damien Day honors Father Damien, a Roman Catholic priest known for his work with leprosy patients in Hawaii. He continued his missionary work on the island of Molokai, where he died of Hansen's disease on April 15, 1889.

Tax Day is the deadline for U.S. residents to file their individual income tax returns with the Internal Revenue Service (IRS). The date is usually on or around April 15 but may be extended to accommodate holidays or extreme weather conditions.

Emancipation Day in Washington D.C. commemorates the signing of the Compensated Emancipation Act in 1862 by President Abraham Lincoln, which freed over 3,000 enslaved individuals in the district. It is a legal holiday in Washington D.C., with local government offices closed.

The Boston Marathon is an annual long-distance running event held in Boston, Massachusetts. It is traditionally held on Patriots' Day.

San Jacinto Day marks the anniversary of the Battle of San Jacinto in 1836, which was a decisive victory for Texas in its war for independence from Mexico. It is a state holiday in Texas.

Patriots' Day commemorates the battles of Lexington and Concord, which were fought near Boston in 1775. It is a state holiday in Massachusetts and Maine.

Oklahoma Day celebrates the anniversary of the date in 1889 when the 'Unassigned Lands' in Oklahoma were opened to settlers, leading to the Land Run of 1889.

Administrative Professionals Day recognizes the work of secretaries, administrative assistants, and other office professionals for their contributions to the workplace.

Take Our Daughters and Sons to Work Day is an educational program in the United States where parents take their children to work to give them an idea of the working environment.

Arbor Day in Nebraska is a state holiday dedicated to planting and caring for trees, reflecting the state's history as the birthplace of Arbor Day.

Arbor Day is a national observance that encourages individuals and groups to plant trees and care for the environment.

Confederate Memorial Day is a state holiday in Florida to honor and remember the Confederate soldiers who died or were wounded during the American Civil War.

The Georgia State Holiday is observed in Georgia; specific details about this holiday can vary.

Confederate Memorial Day is a state holiday in Alabama and Mississippi to honor and remember the Confederate soldiers who died or were wounded during the American Civil War.