For many pagans the start of May is celebrated as Beltaine (Beltane), May Day, Calan Mei, and Walpurgis Night. It is a cross quarter day, falling between the spring equinox and the summer solstice. The UK public holiday May Day occurs on the first Monday of May each year.
Correspondences included: fertility, renewal, maypoles, bonfires, dancing, creativity.
A list of deities and their correspondences can be found here