Most Americans don't realize that May Day has its origins here in this country and is "eight hours shall constitute a legal day's labor from and after May 1. Labour Day is an annual holiday to celebrate the Workers ' Day, which occurs on 1 May. Other dates · Australia · Bahamas · Canada. Many Italians commemorate the labor union movement's social and economic achievements on Labor Day. It is a nationwide public holiday in Italy on May 1. ISISAfghanistanRussia. Decentralized planning Participatory economics. People celebrate all over the country by gathering and cooking or barbecuing. In the United Kingdom and Ireland the bank holiday isn't fixed on May 1st, but instead is observed on the first Monday of May. The Libyan government transition — Prime Minister's Office in Arabic.