Use date variable from parent playbook.

fetch-backup.yaml

@@ -7,7 +7,7 @@
   tasks:
     - name: Fetch volume backups
       fetch:
-        src: "{{ backup_location }}{{ item[0].name }}/{{ item[1] }}-volume-{{ ansible_date_time.iso8601_basic_short }}.tar.gz"
+        src: "{{ backup_location }}{{ item[0].name }}/{{ item[1] }}-volume-{{ date }}.tar.gz"
         dest: "{{ local_backup }}{{ item[0].name }}/"
         flat: yes
       loop: "{{ containers | subelements('volumes', skip_missing=True) }}"
@@ -16,7 +16,7 @@
 
     - name: Fetch database backups
       fetch:
-        src: "{{ backup_location }}{{ item[0].name }}/{{ item[1].container }}-{{ ansible_date_time.iso8601_basic_short }}.sql"
+        src: "{{ backup_location }}{{ item[0].name }}/{{ item[1].container }}-{{ date }}.sql"
         dest: "{{ local_backup }}{{ item[0].name }}/"
         flat: yes
       loop: "{{ containers | subelements('database', skip_missing=True) }}"