when is may 1st

May 1st is known as May Day or International Workers' Day. It is celebrated annually on the first of May as a day to honor laborers and the working classes. This date was chosen by an international federation of socialist groups and trade unions in 1889 to commemorate a general strike in the United States that began on May 1, 1886, and culminated in the Haymarket affair on May 4, 1886. It is a public holiday in many countries, often marked by demonstrations and celebrations in support of workers' rights. In some countries, such as the United States and Canada, Labor Day is instead celebrated on the first Monday in September. Additionally, May Day has older European roots as a spring festival marking the beginning of summer, with traditions involving flowers and maypoles.