Dew on May Day morning was thought to have magical properties. It was said to make you look more beautiful. It was also though to remove freckles and pimples.

May is an unlucky month for marriages.
Children born in May are suppose to be sickly.
Washing your blankets in May is suppose to result in the death of a love one.

Cats born in May are suppose to be good at catching rodents but they will also like to bring snakes into the house