May begins (astrologically) with the sun in the sign of Taurus and ends in the sign of Gemini. Astronomically speaking, the sun begins in the constellation of Aries and ends in the constellation of Taurus.
The month may have been named for the Greek goddess Maia, who was identified with the Roman Goddess of fertility, Bona Dea, whose festival was held in May.
In old Japanese calendar, the month is called Satsuki (皐月). It is also a common name for females. In Japan, there is the so-called May sickness, a kind of sickness where new students or workers start to be tired of their new schoolwork or jobs. It is due to a Japanese custom that all schoolyears and fiscal years start on April 1st.
In Finnish, the month is called toukokuu, meaning "month of sowing". In Slovene, it is called veliki traven, which means the month of high grass.
In the American film industry, the first week of May-- that is, between the 2th and the 8th-- marks the beginning of the summer movie season.
On the full moon of May, Vesak is celebrated in many southeast Asian countries, It comemorates the birth, enlightenment, and death of Siddhartha Gautama.
Trivia
Within any calendar year, no other month begins on the same day of the week as May.