FreeFileSync Forum

I have set the backup revisions keep 7 days.
But I also want a copy for every month and keep 6 month.
How to keep a copy like this:

FileA.xls 2020-04-23.xls
FileA.xls 2020-04-22.xls
FileA.xls 2020-04-21.xls
FileA.xls 2020-04-20.xls
FileA.xls 2020-04-19.xls
FileA.xls 2020-04-18.xls
FileA.xls 2020-04 ...