May Day, the first of May is celebrated around the world. It has a number of meanings. In many other countries it is a celebration of spring and the coming of summer. It is celebrated with many spring flowers, many of them blooming right in your own backyard.
In many countries it is celebrated as part of a one to three day holiday. Of particular note, it is not a national holiday in the United States, except in Hawaii where it is known as "Lei Day".