Juneteenth (officially Juneteenth National Independence Day, and also known as, Jubilee Day, Emancipation Day, Freedom Day, and Black Independence Day, is a federal holiday in the United States commemorating emancipation of enslaved African Americans. It is also often observed for celebrating African-American culture.

Originating in Galveston, Texas, it has been celebrated annually on June 19 in various parts of the United States since 1865. The day was recognized as a federal holiday on June 17, 2021, when President Joe Biden signed the Juneteenth National Independence Day Act into law.

President Abraham Lincoln's Emancipation Proclamation, issued on January 1, 1863, had freed the enslaved people in Texas and all the other Southern secessionist states of the Confederacy except for parts of states not in rebellion

Enforcement of the Proclamation generally relied upon the advance of Union troops. Texas, as the most remote state of the former Confederacy, had seen an expansion of slavery and had a low presence of Union troops as the American Civil War ended; thus, enforcement there had been slow and inconsistent prior to Granger's announcement.

Although the Emancipation Proclamation declared an end to slavery in the Confederate States, it did not end slavery in states that remained in the Union. For a short while after the fall of the Confederacy, slavery remained legal in two of the Union border states – Delaware and Kentucky.

Celebrations date to 1866, at first involving church-centered community gatherings in Texas. They spread across the South and became more commercialized in the 1920s and 1930s, often centering on a food festival.

Celebratory traditions often include public readings of the Emancipation Proclamation, singing traditional songs such as "Swing Low, Sweet Chariot" and "Lift Every Voice and Sing", and the reading of works by noted African-American writers, such as Ralph Ellison and Maya Angelou.

Some Juneteenth celebrations also include rodeos, street fairs, cookouts, family reunions, park parties, historical reenactments, and Miss Juneteenth contests.

When Juneteenth became a federal holiday on June 17, 2021, it was the first new federal holiday since Martin Luther King Jr. Day was adopted in 1983.

The holiday is considered the "longest-running African-American holiday" and has been called "America's second Independence Day". Juneteenth is usually celebrated on the third Saturday in June. Historian Mitch Kachun considers that celebrations of the end of slavery have three goals: "to celebrate, to educate, and to agitate".