An internationally recognized distress signal via radiotelephone (from the French m'aider).
Holiday observed in the United States to celebrate the coming of spring; observed in many other countries in honor of labor; Also called: First of May, May 1.
First day of May. In many countries it is a national holiday in honor of labor; see also Labour Day.
Traditionally the first day of summer, in parts of England it is still celebrated as a pre-Christian magical rite; for example, the dance around the maypole (an ancient fertility symbol).