Card 1:  This card represents the first month for which you are doing the reading.   For example, if when you do the reading, it is the first day of May.   Then you would say that this card would represent the events of the month of May.

Cards 2 through 12: Each card following represents the next successive month in the year.  If you reach December before card twelve, then the next card would reflect those events in January of the next year.