Seward's Day commemorates a pivotal moment in American history when the United States acquired Alaska from Russia, shaping the nation's geopolitical and economic future. This state holiday, celebrated in Alaska, honors William H. Seward, the U.S. Secretary of State who negotiated the Alaska Purchase.

Cesar Chavez Day is a U.S. federal commemorative holiday celebrated annually on March 31. It honors the life and legacy of Cesar Chavez, a civil rights leader and labor activist who co-founded the United Farm Workers (UFW).

Truman Day is a state holiday observed in Missouri to honor Harry S. Truman, the 33rd President of the United States. Truman is celebrated for his leadership during a critical period in American and world history, particularly his decisions during and after World War II.

Jefferson Davis's Birthday is observed as a state holiday in some parts of the United States, particularly in the South. Jefferson Davis (1808–1889) was the President of the Confederate States of America during the American Civil War. The holiday commemorates his life and contributions to the Confederacy.

King Kamehameha I Day is a state holiday in Hawaiʻi to honor King Kamehameha I (1758–1819), the first monarch to unite the Hawaiian Islands under a single rule. Known as Kamehameha the Great, he is celebrated for his leadership, vision, and contributions to the foundation of the Kingdom of Hawaiʻi.

Frances Xavier Cabrini Day is a state holiday in Colorado, established to honor the life and legacy of Saint Frances Xavier Cabrini, the first U.S. citizen to be canonized by the Catholic Church.

Columbus Day commemorates the arrival of Christopher Columbus in the Americas in 1492. This day is a subject of controversy as it also marks the beginning of the colonization of the Americas and the subsequent impact on Native American peoples. While some celebrate this day in honor of Columbus' achievements, others observe Indigenous Peoples' Day instead, recognizing the history and culture of indigenous people affected by European colonization.

Mrs. Rosa L. Parks Day is a day of recognition and celebration honoring Rosa Parks, the "Mother of the Civil Rights Movement." Her pivotal role in the fight for racial equality began on December 1, 1955, in Montgomery, Alabama, when she refused to give up her seat on a segregated bus to a white passenger.