| Date | Day | Commons day type | Commons praying | Lords day type | Lords praying |
|---|---|---|---|---|---|
| Monday | 21st | Prorogation | False | Prorogation | False |
21st September 1964 is in the prorogation between the 5th session and the dissolution of the 42nd Parliament, being the 5th prorogation of that Parliament.
Papers laid during this prorogation are reported by both Houses in the 1st session of the 43rd Parliament.