What is the name of a festive song with a dance-like character about Mary's happiness?
The Seven Joys of Mary (carol) "The Seven Joys of Mary" (Roud # 278) is a traditional carol about Mary's happiness at moments in the life of Jesus, probably inspired by the trope of the Seven Joys of the Virgin in the devotional literature and art of Medieval Europe. Though not traditionally associated with Christmas, it has become so in the modern era.
Ye Watchers and Ye Holy Ones "Ye Watchers and Ye Holy Ones" (Latin: "Vigiles et Sancti" ) is a popular Christian hymn with text by Athelstan Riley, first published in the "English Hymnal" (1906). It is sung to the German tune "Lasst uns erfreuen " (1623). Its uplifting melody and repeated "Alleluias" make this a favourite Anglo-Catholic hymn during the Easter season, the Feast of All Saints, and other times of great rejoicing.