Group backups in to subdirectories

[benr77]

Is it possible to configure things so that backups go in to sub-directories? My backups are running daily and now I have hundreds of backup files in the root directory location.

Ideally I would like to sort backups in to subfolders by month/year

root
root/2018/01
root/2018/02
root/2018/...
root/2018/12

I use this feature with VichUploader's Directory Namers and it works great.
https://github.com/dustin10/VichUploaderBundle/blob/master/Resources/doc/directory_namer/howto/create_a_custom_directory_namer.md

Thanks for a great bundle!