Ansible date Struggle

[ns27...@gmail.com]

I am new to ansible .

Issue:- 

I created 2 ec2 instances successfully and  i am able to retrieve the launch_dates using below .

- name: launch time and date of Ec2 

  debug:

  var: item.launch_time

 with_items: "{{ ec2_facts.instances }}".

 I am using below to get ansible date and time 

 - name: ansible date 

    debug:

    var:  ansible_date_time.iso8601_micro.date

What i am not able to do is, how do i subtract and get the difference between two date ? (item.launch_time - ansible_date_time.iso8601_micro.date) and store is to a variable or integer .

Any help is appreciated .

Regards,

NS