This day is celebrated as International Workers' Day (also known as May Day) all over the world. This day is a celebration of the international labour movement and left-wing movements. May 1 is a national holiday in more than 80 countries. It is also celebrated unofficially in many other countries. It commonly sees organized street demonstrations and marches by working people and their labour unions throughout most of the world.

On this day in 1707, England, Wales and Scotland were united to form Great Britain.

In 1751, America’s first cricket tournament was held in New York City.

In 1905, In New York, radium was tested as a cure for cancer.

In 1927, Adolf Hitler held his first Nazi meeting in Berlin.

In 1948, The People's Democratic Republic of Korea (North Korea) was proclaimed.

In 1950, Gwendolyn Brooks became the first African American to win the Pulitzer Prize for her book of poetry called Annie Allen.

In 2009, For the first time in 341 years, a woman is appointed as poet laureate of the United Kingdom. Carol Ann Duffy, 53, will take over the post from current poet laureate Andrew Motion.