Posted every second day…

October 4

Peter, according to the history of the Church, was also incapable of keeping count of the days of the week. Whenever he decided to go fishing, he would tie up his weekly food into seven parcels, and every day he would eat one of them, and when he had reached the seventh, he would know that the Sabbath had arrived, and thereupon would observe it. 
- ‘Abdu’l-Baha  (Quoted by Shoghi Effendi in ‘The Advent of Divine Justice’)