The festival of Barnabas, Apostle, may be observed on Sunday 11 June or Monday 12 June.
If it is observed on Monday 12 June:

Barnabas the Apostle

https://almanac.oremus.org/2023-06-12

Red

Principal Service
Job 29.11-16
Psalm 112
Acts 11.19-30
John 15.12-17

(or)
Acts 11.19-30
Psalm 112
Galatians 2.1-10
John 15.12-17

Third Service
Jeremiah 9.23,24
Acts 4.32-37
Morning Psalms
Psalms 100, 101, 117

Second Service
Ecclesiastes 12.9-14 or
Tobit 4.5-11
Acts 9.26-31
Evening Psalm
Psalm 147