The Central Labor Union in New York held a combination demonstration/picnic on September 5, 1882, to celebrate the nation's first Labor Day. In the years that followed, the union urged other cities to follow New York's lead and implement a "workingmen's holiday." By 1894, Congress had passed an act making the first Monday in September just such a holiday throughout the United States. To mark Labor Day this year, the American Federation of Labor and Congress of Industrial Organizations (AFL-CIO), a voluntary federation of sixty-five national and international labor unions representing thirteen million workers, has created an online calendar designed to publicize Labor Day events across the country. The site also provides e-cards just for Labor Day as well as articles on topics such as anti-union campaigns and why workers want and need unions in the first place.