What is the newest federal holiday recognized in the United States?

The newest federal holiday recognized in the United States is Juneteenth, which commemorates the emancipation of enslaved African Americans. Juneteenth marks the date of June 19, 1865, when news of the Civil War's end and the abolition of slavery reached the last enslaved people in the United States, specifically in Galveston, Texas.

The recognition of Juneteenth as a federal holiday was established by legislation signed into law on June 17, 2021, making it a significant addition to the list of federal holidays. This day symbolizes not only the end of slavery but also recognizes the ongoing struggle for racial equality and justice.

In contrast, Labor Day, Memorial Day, and Thanksgiving have been established for much longer, with their origins dating back to the late 19th century or earlier. Hence, Juneteenth stands out as the most recent holiday added to the federal calendar.