find command with -ctime +0 for testing

the following command will delete directors and sub directories that older then 100 days

 find /var/tmp -type d -ctime +100 -exec rm -rf {} \;

but actually I want to perform test to verify if the command will remove all directories

so I set -ctime +0 ( in order to perform remove directories that old then 0 day )

  find /var/tmp -type d -ctime +0 -exec rm -rf {} \;

but the find command not remove the directories

Please advice how to change the -ctime ? in order to perform the test