The Festival of the Blessed Virgin Mary may, for pastoral reasons, be observed on 8 September instead of 15 August.
If it is observed on 8 September then the Collect, Post Communion and Lectionary for 15 August replace those for 8 September.
The Birth of the Blessed Virgin Mary

http://almanac.oremus.org/2020-09-08

Exciting Holiness
Micah 5.2-4
Canticle: Judith 16.13-16
Romans 8.28-30
Matthew 1.[1-16] 18-23

Holy Communion
1 Corinthians 6.1-11
Psalm 149.1-5
Luke 6.12-19

Morning Prayer
Psalms 132, 133
2 Samuel 18.19-19.8a
Acts 11.1-18

Evening Prayer
Psalms (134), 135
Proverbs 25.15-end
Mark 8.22-26

Additional Weekday Lectionary
Proverbs 18.10-21
Romans 14.10-end