Invoke a Cron Job a week earlier

[infrastructure]

Hi 

I have a patching Job that gets executed first Monday of every month. However, I would like the ticket to be triggered a week earlier so that the Engineers are notified giving them time to prepare for the task. 

All the syntax I have seen refers to running a scheduled job at a specific time of the month or day, but nothing to indicate if the scheduled job can be invoked a week or few days earlier.