From the Benedictine Breviary
Te beata sponsa Christi, Vespers Hymn (Antiphonale Monasticum)
Hymnis angelicis ora resolvimus, Matins (Liber Responsoralis)
Jam noctis umbrae concidunt, Lauds Hymn (Antiphonale Monasticum)
Translations of the Vespers and Lauds Hymn can be found in “The Liturgical Year, Gueranger, Vol. 4 pg. 270.
A Proper Mass for this Feast can be found in the supplement to the Graduale Romanum, this includes a Sequence, Emicat meridies, Et beata requies.