The Virgin Mary is known by many titles. Some of these titles are dogmatic in nature, referring to Marian beliefs that the Church views as necessary for salvation. Many other titles are poetic or allegorical and have lesser or no canonical status, but which form part of popular piety, with varying degrees of acceptance by the clergy. Yet more titles refer to depictions of the Virgin Mary in the history of art.

Among the most prominent Marian titles in the Roman Catholic Calendar are:

Mary, Mother of God
Mary, the Immaculate Conception
Mary, Queen of Heaven
Queen of the Angels
Queen of Peace
Star of the Sea (Stella Maris)
Mother of All Sorrows
Among the most prominent Marian titles in the Eastern Orthodox and Greek-Catholic liturgical calendars are:

Panagia Myrtidiotissa
Panagia Evangelistria (Our Lady of the good Tidings)
Aeiparthenos Maria (forever virgin Mary)
Hyperagia Theotokos (most Holy Mother of God)
Axion Esti (it is worthy to bless Thee, the Virgin)
Panagia Despoina (Our Lady and Queen)

During the month of May, May devotions to the Blessed Virgin Mary take place in many Catholic regions. There is no firm structure as to the content of a May devotion. It includes usually the singing of Marian anthems, readings from scriptures, a sermon, and or presentation by local choirs. The whole rosary is prayed separately and is usually not a part of a Marian devotion, although Hail-Marys are included.[20]

Traditionally, the month of October is "rosary month" in the Catholic Church, when the faithful are encouraged to pray the rosary if possible. Since 1571, Mary, Queen of the Holy Rosary, is venerated on October 7.[21] Pope Benedict XVI, following all his predecessors, also encourages the rosary during the month of October:

Annunciation by Caravaggio, 1608Among the most prominent Marian feast days in the ordinary Roman Catholic Calendar are

January 1 Mary, Mother of God
February 11 Our Lady of Lourdes
March 25 Annunciation
May 1 Queen of Heaven
May 13 Our Lady of Fátima
May 24 Mary Help of Christians patron of Australia
May 31 Visitation of the Blessed Virgin Mary
July 16 Our Lady of Mount Carmel
August 15 Assumption into Heaven
August 22 Queenship of Mary
September 8 Nativity (birth) of the Blessed Virgin Mary
September 15 Our Lady of Sorrows
October 7 Feast of the Most Holy Rosary
December 8 Feast of the Immaculate Conception
December 12 Our Lady of Guadalupe
Among the most prominent Marian feast days in the Eastern Orthodox and Greek-Catholic liturgical calendars are:

March 25 Annunciation of the Theotokos
August 15 Dormition of the Theotokos
September 8 Nativity of the Theotokos
November 21 Entry of the Theotokos into the Temple
December 26 Synaxis of the Theotokos