Scheduling Calendar

This calendar was developed by Whizbang a while ago. I've left a post on the original thread but wanted to see if anyone else could solve my issue.

This calendar is great! It is almost exactly what I need. I was wondering if there was a way to add a second date for each event. I appraise real estate and I need to keep track of not only the day I inspect the property but also the day the report is due to my client. I've been trying to figure it out for the last couple hours but I'm not familiar enough with the "INDEX" function to figure out what's going on in this spreadsheet.

Ideally I would like to have each event on the calendar twice with maybe the second time having some sort of signifier, like the cell being highlighted to indicate it is the due date and not the inspection date. I could probably figure this out if the first part was done.

Thanks for the help!
Brian