I've built an SSIS package that runs on schedule weekly on Mondays. It looks for a .csv file that has a date at the end of the file name, which is 2 Saturdays ago from the date it runs (on Mondays). I need the variable to default to two Saturdays ago. Example: SSIS job runs on 7/9/2018, it needs to set it to 6/30/2018. SSIS needs to be runnable in case of failure, so if it has to be run again on, for example, 7/11/2018, it needs to default to 6/30/2018. This is a weekly job scheduled to run on Mondays.
I found a question posted similar to my need and the link is below for additional reference.