How to pass today's date and time as argument in ansible

I am running python script using ansible.

Here is my playbook -

- name: Run python script 
  command: python Test.py -StartDate 2020-10-01T00:00:00 -EndDate 2020-11-05T00:00:00
  register: result
- debug: msg="{{result.stdout}}"

I want this playbook to use EndDate as todays date when I run script. How can I use latest date and time in same format I have written every time I run script without having to change manually every day?

assuming the T00:00:00 is always fixed, you could declare a variable using the lookup plugin, see an example below the exec_date variable and the modified command task:

---
- hosts: localhost
  gather_facts: false
  vars:
    exec_date: "{{ lookup('pipe', 'date +%Y-%m-%d') }}T00:00:00"

  tasks:
  - name: print
    debug: var=exec_date

  - name: Run python script 
    command: "python Test.py -StartDate 2020-10-01T00:00:00 -EndDate {{ exec_date }}"
    register: result
  - debug: msg="{{result.stdout}}"

If you want to pass the current time too instead of a fixed T00:00:00, you could use the below:

  vars:
    exec_date: "{{ lookup('pipe', 'date +%Y-%m-%dT%H:%M:%S') }}"

cheers