Some Interfaith May Inspirations:
May and June mark the season of the Hopi Kachina Dances, in which Arizona Hopi celebrants represent various spirit-powers and perform ritual dances in open pueblo areas.  It is also the time of Yansa’altt, the season of berry blossoms—anticipating the berry harvest in summer,
which is essential for survival in winter.

Zoroastrianism Ghambar Maidyozarem April 29-May 4
Celebrating the creation of sky and the harvesting of the winter crops.

Interfaith National Day Of Prayer (USA) ~ May 1
An annual day of observance held on the first Thursday of May, designated by the United States Congress, when people are asked "to turn to God in prayer and meditation"

Wicca/Pagan Beltane and Samhain
~ Northern and Southern Hemispheres ~ May 1st
Northern hemishere Pagans celebrate Beltane with maypole dances,
symbolizing the mystery of the Sacred Marriage of Goddess and God.
Southern hemishere Pagans celebrate Samhain (pronounced 'sow'inn').
Samhain, aka Hallowe'en, marks the Feast of the Dead.
Many Pagans also celebrate it as the old Celtic New Year (although some mark this at Imbolc).

Baha'i 12th Night of Ridvan ~ May 1
A Baha'i commemoration of the twelve day period in 1863 when Baha'u'llah declared that he
was God's messenger for this age.

Interfaith Happy Mother's Day! ~May 11 ~
Mother's Day is a day dedicated to honoring and recognizing the sacrifices and accomplishments of mothers. Mothers are recognized by family and friends; regardless of whether they are biological or perceived maternal figures. In 1914, Woodrow Wilson signed a proclamation recognizing the second Sunday in May as Mother's Day.

Buddhist Visakha Puja ~ Wesak ~ Buddha Day ~ May 12
The most important of the Buddhist festivals. It celebrates the Buddha's birthday,
and, for some Buddhists, also marks his enlightenment and death.

Baha'i Azamat ~ May 16
The beginning of the fourth month in the Bahá’í calendar, “Azamat” means “grandeur.”

Baha'i Declaration of the Bab ~ May 23
The Bab was the Forerunner of Baha'u'llah, founder of the Baha'i faith. His mission was to prepare the world for the coming of Baha'u'llah; he declared it in the evening of May 22 1844.

Baha'i Ascension of Baha'u'llah~ May 29 (Begins Sundown 28th)
Anniversary of Baha'u'llah's death in in 1892 near Akka, Israel.