Hi H.K.,
Work backwards. Start with the Harvest Moon date, September 22. You are given "one week before two days after three days before," so start with three days before:
3 Days Before=September 19
2 Days After 3 Days Before=September 21
One Week Before 2 Days After 3 Days Before=September 14, which is "today."
Wacky Wanda will have to wait eight days.
I hope this helps.