Marian is an adjective for things relating to Mary, such as Marian apparitions, devotions, processions, or statues .
Pope Pius XII,recognizing traditional precedents, proclaimed the "Queenship of Mary" through his encyclical, Ad Caeli Reginam. In his 1965 encyclical, Mense Maio, Pope Paul VI identified the month of May as an opportune time to incorporate special prayers for peace into traditional May devotions. There is no firm structure as to the content of a May devotion. It usually includes the singing of Marian anthems, readings from scriptures, and a sermon. While devotions may differ in various countries, the Marian title "Queen of May" exists in several countries as manifested in Marian songs.
May crownings occur in many Roman Catholic parishes and homes with the ceremonially crowning of a statue of Mary with flowers to signify her as Queen of Heaven and the Mother of God. The climax of such a celebration is the moment when the one of those present places a crown of flowers on Mary's head accompanied by a traditional hymn. The ceremony usually takes place with young girls in dresses carrying flowers to adorn the statue. One of the girls (often the youngest) carries a crown of flowers or an actual golden crown on a cushion for placement by the May Queen (often the oldest girl) on the statue.
In some orders where women chose their own religious names, presumably for the saint whom they most wished to emulate, "Mary the Mother of Christ was so far ahead of all the others that virtually every member of the order was sister Mary-Something-Or-Other. Because it was so common, it was conventionally abbreviated to 'Sister M. Whatever,' as you needed the Whatever to distinguish one nun from another."
- A May Hymn, a song included within The Moist Heart, celebrates Mary as "fresh and pure and kind", and that sweetly smiling, plaster statues of her will be "deck[ed] with fragrant weeds" (Saint Fidgeta and Other Parodies, 117-8).