filemod

- hosts: all
  name: test stat output
  tasks:
      - name: check last change to file
      stat:
        path: '/etc/fstab'
      register: st

    - debug:
        msg: "File last modified {{ansible_date_time.epoch|int - st.stat.mtime|int }} seconds ago"

    - name: run command if file older than one hour
      command: /bin/echo "yes"
      when: "{{ansible_date_time.epoch|int}} - {{ st.stat.mtime|int }} < 3600"

    - name: run command if file older than one hour
      command: /bin/echo "no"
      when: "{{ansible_date_time.epoch|int}} - {{ st.stat.mtime|int }} >= 3600"