What does Benjamin Franklin mean by saying: I, in my Almanack, filled all the little spaces that occurred between the remarkable days in the calendar with proverbial sentences? What are the little spaces and remarkable days he is talking about?

I therefore filled all the little spaces that occurred between the remarkable days in the calendar with proverbial sentences, chiefly such as inculcated industry and frugality as the means of procuring wealth and thereby securing virtue; it being more difficult for a man in want to act always honestly as, to use here ...

Benjamin Franklin really wanted to track his progress in living a particular lifestyle full of discipline and virtue. He actually marked his calendar keeping track of these traits.