create_directory() {
    current_date=$(date '+%Y-%m-%d')
    name="Backup-"$current_date
    mkdir /home/user/$name
}

create_backup_directory() {
    directory_name=$(ls -d $1*/)
    echo "Directory name: "$directory_name
    directory_name=$(echo $directory_name | grep "[a-zA-Z0-9_/-]*")
    echo "Directory name: "$directory_name
    if [[ $directory_name == '' ]]; then
        #create_directory
        echo "Empty"
    else
        starting_path_length=$((`expr length "$1"`+8))
        directory_name_length=$((`expr length "$directory_name"`-1))
        previous_date=$(echo $directory_name | cut -c$starting_path_length-$directory_name_length)
        echo "Previous date: "$previous_date
        date_format="%Y-%m-%d"
        echo $(date --date="$(date) - $1 day" +$date_format)
        #echo "Day difference: "$day_difference
    fi
}

create_backup_directory /home/user/