How to import listings and specify days back
Your website may have a huge number of listings going back many years and you might just want to restrict your listing imports for the past 365 days.
With the FeedSync &days_back=365 option you can easily do just this.
Update your existing WP All Import jobs with the new URL
If you already have a bunch of listings imported and want to now enable the Days Back filter just adjust your Import Settings.
Modify your WP All Import Job
Dashboard > All Import > Manage Imports > (your job) > Import Settings
Append the days_back option to your import URL
Run your import
During this process listings that no longer exist at the URL will be removed.