International Workers' Day
police riot. While the rest of the world sees the date as a key moment for worker's rights, the United States was afraid of the connection and set its labor day at the end of summer.
Christianity absorbing a pagan holiday. May Day is a traditional spring festival with bonfires and young girls dancing around poles.
As one word, mayday is a distress code from the French venez m'aider, meaning "come help me!"