Start_date_time templating don't work

Configuration
1

Hello, when I save the following automation :

alias: fin evenement google calendar (chauffe eau)
description: ""
trigger:
  - platform: calendar
    event: end
    entity_id: calendar.42ruedesroches_gmail_com
condition: []
action:
  - service: calendar.get_events
    target:
      entity_id:
        - calendar.42ruedesroches_gmail_com
    data:
      start_date_time: "{{ (today_at("01:00:00") + timedelta( days = 1)).strftime('%Y-%m-%d %H:%M:%S')}}"
      duration:
        days: 3
    response_variable: agenda
  - service_template: |
      {% if (agenda['calendar.42ruedesroches_gmail_com'].events | count) > 0 %}
        light.turn_on
      {% else %}
        light.turn_off
      {% endif %}
    entity_id: light.lave_linge_commutateur
mode: single

the start_date_time template disappears. Code after save.

alias: fin evenement google calendar (chauffe eau)
description: ""
trigger:
  - platform: calendar
    event: end
    entity_id: calendar.42ruedesroches_gmail_com
condition: []
action:
  - service: calendar.get_events
    target:
      entity_id:
        - calendar.42ruedesroches_gmail_com
    data:
      start_date_time: ""
      duration:
        days: 3
    response_variable: agenda
  - service_template: |
      {% if (agenda['calendar.42ruedesroches_gmail_com'].events | count) > 0 %}
        light.turn_on
      {% else %}
        light.turn_off
      {% endif %}
    entity_id: light.lave_linge_commutateur
mode: single

templating result : “{{ (today_at(“01:00:00”) + timedelta( days = 1)).strftime(‘%Y-%m-%d %H:%M:%S’)** }}”

2024-03-26 01:00:00

it’s good.

I think I didn’t understand something…

2

Don’t use double quotes inside the template (in this case around the time) if you are using them outside the template, use single quotes instead.

Also, the strftime() is not needed:

...
    data:
      start_date_time: "{{ today_at('01:00:00') + timedelta(days = 1) }}"
....