September 9—the ninth day of the ninth month—is one of the three most intense days you will experience this year. If, for example, you are in an 8/4 cycle year, on September 9 you will also be in an 8/4 cycle month and an 8/4 cycle day, so the energy of your cycle year will be magnified.
If you are at the beginning of a new cycle, this is the day to get very serious about starting new things. Ignore this day at your peril. If you are at the end of a cycle, now is the time to do a serious closet cleansing, metaphorically and actually.