St. Ignatius feast day is July 31. I pray a novena asking for his intercession each year. I use one from the Discerning Hearts website, you can read or listen to it, here is the link to the whole novena. I will also post each days’ prayers.
If you start it on July 23 you will end on July 31 or you can start today and end July 30. I’m never sure if you should end the novena on the feast day or the day before. I’m of the mind that praying is the important thing, so do what you will. I’m starting tomorrow.