I love festivities and traditions.
May Day with it's flower baskets and Maypoles is based in pagan ideas--I think it's all fascinating and fun.
May Day around the world
Some history of the day: here,
and history of Maypoles: here
interesting history and origin
an amazing collection of Maypole postcards (real photos)
Vintage Japanese matchbox cover:
Peanuts Garden Flag I saw on ebay
May Day craft ideas