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

Barnabas the Apostle

https://almanac.oremus.org/2023-06-11

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

BCP: Saint Barnabas, Apostle

In the BCP calendar, the Festival of St Barnabas may either be celebrated on Sunday 11 June or it may be transferred to Tuesday 13 June

BCP Holy Communion

Job 29.11-16
Psalm 112
Acts 11.22-end
John 15.12-16