On all the other days, you will be stroking and edging... Some days a lot, others not so much. The number of edges you must complete each day must *exactly* equal the day of the month.
So, for example, on January 1 you must edge exactly one time - no more, no less! On January 2, edge twice. January 3rd, three times... and so on.
Until finally, on January 31, you must edge 31 times and then, since it is the 31st of the month, you get to Cum!