The founders of Labor Day are primarily considered to be two labor activists: Peter J. McGuire and Matthew Maguire, both of whom played significant roles in the establishment of the holiday, though there is debate over who should receive full credit.

• Peter J. McGuire is traditionally credited as the founder of Labor Day. He was a cofounder of the United Brotherhood of Carpenters and the American Federation of Labor (AFL). McGuire is said to have proposed the idea of a Labor Day holiday in 1882 to the Central Labor Union in New York, suggesting a parade to celebrate the strength and solidarity of labor organizations. His advocacy helped popularize the concept, and he is often called the "father of Labor Day" in many official accounts

• Matthew Maguire , a machinist and secretary of the Central Labor Union of New York, is also credited by some historians and recent research as the true originator of Labor Day. Maguire organized the first Labor Day parade in 1882, sent out invitations, and led the parade. Evidence including historical records and newspaper accounts from the time suggest he played a crucial role in putting the idea into action. Some sources argue that Maguire's socialist politics may have led to his contributions being overshadowed by McGuire's more mainstream reputation

In summary, both Peter McGuire and Matthew Maguire were key figures in the founding of Labor Day, with McGuire credited for proposing the idea and Maguire credited for organizing the first celebration. The holiday, which became a federal holiday in 1894, honors the American labor movement and the contributions of workers