Im trying to incorporate the date into a directory path

I want to name a folder using the bash command "date +%y%m%d" and then
call that path later on in the script as in:

# This works great
  today = `date +%y%m%d`
  directory = "mkdir -p /Users/me/github/splat/`date +%y%m%d`"
  exec directory


#This part doesnt work

 command = "git clone --mirror https://github.com/org/#{repo_name}.git
/Users/me/github/splat/`date +%y%m%d`/#{repo_name}/"
  exec command

As I understand it when the backticks are used it opens a sub shell, how
can I get that directory name?

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