The Festival of the Blessed Virgin Mary may be celebrated on Tuesday 15 August,If the Blessed Virgin Mary is celebrated on Tuesday 15 August:

The Blessed Virgin Mary

https://almanac.oremus.org/2023-08-15

White

Principal Service
Isaiah 61.10,11 or
Revelation 11.19 – 12.6,10
Psalm 45.10-17
Galatians 4.4-7
Luke 1.46-55

Third Service
Isaiah 7.10-15
Luke 11.27,28
Morning Psalms
Psalms 98, 138, 147.1-12

Second Service
Song of Solomon 2.1-7
Acts 1.6-14
Evening Psalm
Psalm 132