Mr_Noodle wrote:You can try matching against the last date, then in the Rename pattern, when you add that date attribute, you can adjust the date by subtracting a month.
Thanks for the tip @Mr_Noodle! Took me some tweaking but got it to work finally! Here's the note I wrote to myself:
To subtract a month for the date, on “Rename with pattern” > control click “Smart Date Match” > Adjust Date > -1 months