How to delete all files and subfolders older than 5 days by cmd call

Question

I use Windows.

I want to delete all files and subfolders older than 5 days by system call.

I have this command, but i want to delete all files and subfolders older than 5 days.

FOR /D %i IN (C:\mydir*) DO RD /S /Q "%i"

DEL /Q C:\mydir*.*

Do you know an easier way?