Mary, Queen of Apostles / Celebrated on the Saturday between Ascension and Pentecost

Q: Where did the title Mary Queen of Apostles come from? 
A: Mary Queen of Apostles, understood as title/advocation first appears in....
campus.udayton.edu/mary/questions/yq/yq40.html

The Blessed Virgin Mary, Mother and Teacher in the Spirit

Explanation for the votive Mass with the above title:
campus.udayton.edu/mary/resources/bvmtext3.htm#32

The Holy Spirit and the Blessed Virgin 
Letter of Pope Paul VI to Cardinal Léon Josef von Suenens on the Occasion of the International Marian Congress, May 13, 1975.  
Pope Paul VI emphasized the need to couple devotion to the Virgin Mary with devotion to the Holy Spirit in these critical times.
campusudayton.edu/mary/resources/documents/suenens.html

Theme: The Life of Mary: Pentecost

Among the document references, this from Behold Your Mother:

There are striking likenesses between the Annunciation and Pentecost. Mary, the great mother figure for the Church, is present not only at the Annunciation, but praying with her Son's disciples before Pentecost. 79
After Christ's Resurrection, surrounded by His disciples, Mary prayed for the coming of that same Spirit, in order that the Church, the Body of her Son, might be born on Pentecost. 115 
See more at: campus.udayton.edu/mary/resources/documents/docs6-2l.html

Theme: Mary and the Holy Spirit: General

Among the document references, this from Marialis Cultus:

In the Virgin Mary everything is relative to Christ and dependent upon Him. It was with a view to Christ that God the Father from all eternity chose her to be the all-holy Mother and adorned her with gifts of the Spirit granted to no one else. 25
See more at: campus.udayton.edu/mary/resources/documents/docs3-0.html

Theme: Mary and the Holy Spirit: Overshadowed by the Spirit (Incarnation)

Among the document references, this from Behold Your Mother:

Any correct understanding of Mary's role must be seen in connection with the predominant role of the Holy Spirit. ... St. Luke presents Mary as the humble woman overshadowed by the Holy Spirit in order that Christ be formed. "God sent his Son born of a woman ... that we might receive the adoption of sons." (Gal 4:4) (LG 52) 112
See more at: campus.udayton.edu/mary/resources/documents/docs3-1.html

Theme: Mary and the Holy Spirit: Fashioned by the Spirit (Her whole existence)

Among the document references, this from Marialis Cultus:

Theological reflection and the liturgy have in fact noted how the sanctifying intervention of the Spirit in the Virgin of Nazareth was a culminating moment of the Spirit's action in the history of salvation. Thus, for example, some Fathers and writers of the Church attributed to the work of the Spirit the original holiness of Mary, who was as it were "fashioned by the Holy Spirit into a kind of new substance and new creature." (LG 56) 26
See more at: campus.udayton.edu/mary/resources/documents/docs3-2.html

Theme: Mary and the Holy Spirit: Fullness of Grace

Among the document references, this from Signum Magnum:

It was this perfect harmony between divine grace and her own human activity that gave honor to the Blessed Trinity and made her the crowning glory of the Church. 16
See more at: campus.udayton.edu/mary/resources/documents/docs3-3.html

The Holy Spirit and Mary

This collection covers the themes: The Year of the Holy Spirit, 1998; Sacred Scripture Concerning the Holy Spirit and Mary; Mary as Image of the Holy Spirit; Marialis Cultus: The Holy Spirit and Marian Devotion; Recent Magisterial Teachings on the Holy Spirit and Mary; The Holy Spirit and Mary in Iconography
campus.udayton.edu/mary/meditations/h-spirit.html

Mary, Mother of the Church

After fifty days of joyous celebration, the Easter Season solemnly closes each year with the great feast of Pentecost Sunday. This has been traditionally called the "birthday" of the Church, that day when "all were filled with the Holy Spirit." (Acts 2:4) Pentecost occurs ten days after the Ascension of Our Lord Jesus Christ ....
A reflection by Rev. Matthew R. Mauriello:
campus.udayton.edu/mary/meditations/Mchrch.html

Who Was Mary?

In this reflection, the author writes: At the end of her beloved Son's terrible passion and atrocious death, then his glorious resurrection and ascension, St. Luke tells us in the Acts of the Apostles that the Mother of Jesus was in the upper room with fearful apostles awaiting the outpouring of the Pentecostal Spirit. Hers was an extraordinarily significant presence to the fledgling Church. The apostles were new shepherds (pastors) of Christ's Church. The Mother of Jesus is in their midst, forgiving and reconciling the disciples .... A reflection by the late Rev. Eamon R. Carroll, O. Carm.:
campus.udayton.edu/mary/meditations/carroll.html

Mary's Apostolic Mission And Our Participation

The Vision of Venerable William Joseph Chaminade developed by Father Emil Neubert, S.M. Brother John M. Samaha, S.M.:
campus.udayton.edu/mary/meditations/chaminade/participation.html

Present in Every Sunday of the Church

On May 31, 1998, the feast of Pentecost, the Holy Father addressed to all bishops, clergy, and faithful the apostolic letter Dies Domini on the "sanctification of the Lord's Day." The text is clear and divided into five chapters: 1) Day of the Lord; 2) Day of Christ; 3) Day of the Church; 4) Day of the Person; 5) Day of Days. Subtitles within the chapters give further expressive and suggestive names for Sunday: "day of the new creation," "day of Christ the Light," "day of the gift of the Holy Spirit".... by Rev. Ignacio Calabuig, OSM:
campus.udayton.edu/mary/meditations/calabuig.html

Novena Prayers to Mary, Queen of Apostles
Devotion to Mary as Queen of Apostles is one of the oldest devotions in the Church....
campus.udayton.edu/mary/prayers/Queennovena.html

The Glorious Mysteries of the Rosary

Ascension and Pentecost reflections based on the Catechism of the Catholic Church.
Art from Dominican Nuns, Monastery of Our Lady of the Rosary, Buffalo, NY
campus.udayton.edu/mary/meditations/glorious.html

Two Masterpieces Depicting Mary with the Apostles at the Ascension
campus.udayton.edu/mary/news97/0506.html

Icons / Kinds of Marian Icons
Article contains representations of an Ascension and a Pentecost icon
campus.udayton.edu/mary/resources/icon3.html

The Holy Spirit and Mary
This article contains several masterpieces depicting various scenes with the Holy Spirit and Mary
campus.udayton.edu/mary/meditations/h-spirit.html