
Emerald is regarded as the traditional birthstone for May, as well as the traditional gemstone for the astrological signs of Taurus and Cancer.
According to Rebbenu Bachya, the Hebrew word "Nofech" in Exodus 28:18 means "Emerald", and was the stone on the Ephod representing the tribe of Judah. According to other commentaries, "Nofech" means "garnet", and another stone, the "Bareqet", which might represent the tribe of Levi, is thought to be emerald.
In some cultures, the emerald is the traditional gift for the 55th wedding anniversary. It is also used as a 20th and 35th wedding anniversary stone.

The bird of May is the nightingale
May's birth flower is the lily of the valley or hawthorn.
May's birthstone is the emerald.
May is the only month in which a President of the United States has not died.
May in the Northern Hemisphere is the seasonal equivalent to November in the Southern Hemisphere and vice versa

European Robin, at 15-16.5 cm length. It is plain brown above except for the reddish tail. It is buff to white below. Sexes are similar.
The male Nightingale is known for his singing, to the extent that human singers are sometimes admiringly referred to as nightingales; the song is loud, with an impressive range of whistles, trills and gurgles. Although it also sings during the day, the Nightingale is unusual in singing late in the evening; its song is particularly noticeable at that time because few other birds are singing. This is why its name (in several languages) includes "night". Recent research has shown that the birds sing even more loudly in urban or near-urban environments, in order to overcome the background noise. The most characteristic feature of the song is a loud whistling crescendo, absent from the song of Thrush Nightingale. It has a frog-like alarm call.
In popular traditions, the Nightingale announces the coming of spring, and is a symbol of love.

May is the fifth month of the year in the Gregorian Calendar and one of seven Gregorian months with the length of 31 days.
May begins (historically) 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. See:-Months in various calendars
in May
In the neopagan Wheel of the Year May begins on Beltane in the northern hemisphere and Samhain in the southern hemisphere.
In the Irish calendar May 1 is Beltane (Bealtaine), the first day of Summer, and a public holiday is held on the first Monday in May.
In many countries, May Day is May 1. This is celebrated as Labor Day in many countries.
In the United Kingdom, May Day is May 1, but a public holiday is held on the first Monday in May.
In Germany it is an old custom to plant a "tree of May" to honor someone. Often young men set up an adorned birch in front of their girlfriends house in the night before May 1.
Cinco de Mayo or the Batalla de Puebla is celebrated in Mexico on May 5.
In Western Europe May 8 is VE Day. In Eastern Europe it is celebrated on May 9.
In the European Union May 9 is Europe Day
On 12 May, International Nurses Day is celebrated.
May 12 is also International Awareness Day for Chronic Immunological and Neurological Diseases (CIND). These diseases include Neurofibromatosis, Chronic Fatigue Immune Dysfunction Syndrome (CFIDS)/Myalgic Encephalomyelitis, Fibromyalgia, Gulf War Syndrome and Multiple Chemical Sensitivity.
On 17 May, the Norwegian Constitution Day is celebrated.
In Argentina, the May Revolution (or Revolución de Mayo), a national holiday, is on May 25.
Towel Day is celebrated in May in tribute to Douglas Adams, author of The Hitchhiker's Guide to the Galaxy.
Under the French Ancien Régime, it was of habit to “plant a May” or a “tree of May” in the honor of somebody. The County of Nice saw girls and boys “turn the May” with the sound of fife and drum, i.e. to dance rounds of May around the tree of May planted on the place of the village.
The second Sunday in May is Mother's Day in the United States.
May 4th Star Wars Day (May the 4th be with you)
May 4th in the Netherlands is the day of Remembrance of the Dead, commemorating all the casualties in military conflicts involving the Netherlands.
May 5th is the Children's Day in Japan.
May 5th is Liberation Day in the Netherlands, celebrating the ending of the German occupation.
Each year in May, the Eurovision Song Contest is held
Finland's Day in Finland on the 12th of May

The lusty month of May!
May Day begins the fifth month for the Greek Goddess Maia. The Celtic name is Beltane May Day (the beginning of summer). The Maypole - Symbol of Beltane
May Day customs include: archery tournaments, dances, feasting, music, drinking, electing the "Queen of the May"
the Beltane celebration was mostly a time of unashamed human sexuality and fertility. The Maypole, possibly a phallic symbol
The 'greenwood marriages' tradition where young men and women who spent the entire night in the forest, bringing back flowers and garlands the next morning.
The lusty month of May!...
Those dreary vows that ev'ryone takes,
Ev'ryone breaks.
Ev'ryone makes divine mistakes!
The lusty month of May!