date module is not working as expected

[vinod...@gmail.com]

HI team,

I have a below playbook, where it works fine if I enter dates manually in vars. but it fails when passing through register. tried max possibilities.

need your help

- hosts: one
  become: true
  tasks:
    - shell: " dsmc query filespace / | tail -n 1 | awk '{print$2}'"
      register: backup
    - shell: "date +'%Y-%m-%d'"
      register: today
    - shell: "date -d '{{backup.stdout}}' +'%Y-%m-%d'"
      register: test
    - set_fact:
         date1: "{{test.stdout}}"
         date2: "{{today.stdout}}"
    - debug:
         msg: "{{date1}} and {{date2}}"
    - template:
         src:  /home/viraj4/ansible/date.j2
         dest: /tmp/date.txt
    - shell: "cat /tmp/date.txt"
      register: date
    - debug:
         msg: "{{ date.stdout }}"
    - shell: "> /tmp/date.txt"

[viraj4@********* ansible]$ cat /home/viraj4/ansible/date.j2
{{ (date1 -  date2).days }}

output:

TASK [debug] ***********************************************************************************************************************************************************
ok: [******************** => {
    "msg": "2019-02-13 and 2019-02-13"
}
Perform task: TASK: template (N)o/(y)es/(c)ontinue: y

Perform task: TASK: template (N)o/(y)es/(c)ontinue: ********************************************************************************************************************

TASK [template] ********************************************************************************************************************************************************
fatal: [***************************]: FAILED! => {"changed": false, "msg": "AnsibleError: Unexpected templating type error occurred on ({{ (date1 -  date2).days }}\n): unsupported operand type(s) for -: 'AnsibleUnsafeText' and 'AnsibleUnsafeText'"}
        to retry, use: --limit @/home/viraj4/ansible/time.retry