HA Spot Price AC automation schedule

automation.yaml:
[...]
- id: '1663398489357'
  alias: 'Set device start time'
  description: ''
  trigger:
  - platform: time
    at: '23:10:00'
  condition:
  - condition: not
    conditions:
    - condition: state
      entity_id: sensor.cheapest_hours_energy_tomorrow
      state: unknown
  action:
  - service: input_datetime.set_datetime
    data:
      time: '{{ as_timestamp(states(''sensor.cheapest_hours_energy_tomorrow'')) | timestamp_custom(''%H:%M'') }}'
    target:
      entity_id: input_datetime.device_start_time
  - service: input_datetime.set_datetime
    data:
      time: '{{ ((as_timestamp(states(''sensor.cheapest_hours_energy_tomorrow'')) + (3600*3)) | timestamp_custom(''%H:%M'')) }}'
    target:
      entity_id: input_datetime.device_end_time
  mode: single

# This works and was "last_triggered: last_triggered: 2023-02-23T22:00:00.001828+00:00"
- id: '1663399614818'
  alias: Increase heating
  description: ''
  trigger:
  - platform: time
    at: input_datetime.device_start_time
  condition: []
  action:
  - service: climate.set_temperature
    data:
      temperature: 23
    target:
      entity_id: climate.ac_12494102
  mode: single

# This does not work since it was "last_triggered: 2023-02-23T22:00:00.002180+00:00"
- id: '1678659614819'
  alias: Decrease heating
  description: ''
  trigger:
  - platform: time
    at: input_datetime.device_end_time
  condition: []
  action:
  - service: climate.set_temperature
    data:
      temperature: 21
    target:
      entity_id: climate.ac_12494102
  mode: single

config.yaml:
[...]
# Helper to keep the start time
input_datetime:
  device_start_time:
    name: Device Start Time
    has_time: true
    has_date: false
  device_end_time:
    name: Device End Time
    has_time: true
    has_date: false
automation: !include automations.yaml
sensor: !include sensors.yaml
[...]

sensors.yaml:
[...]
- platform: template
  sensors:
    energy_spot_price:
      friendly_name: "Nordpool Spot Price"
      unit_of_measurement: 'c/kWh'
      value_template: "{{ ('sensor.nordpool_kwh_fi_eur_2_10_01')  }}"
    energy_helen:
      friendly_name: "Helen Spot Price €/kWh"
      unit_of_measurement: '€/kWh'
      value_template: "{{ (states('sensor.nordpool_kwh_fi_eur_2_10_01')  | float / 100  ) | round(4) + 0.0034 }}"

    energy_helen_alv10c:
      friendly_name: "Helen Spot Price c/kWh alv. 10%"
      unit_of_measurement: 'c/kWh'
      value_template: "{{ (states('sensor.nordpool_kwh_fi_eur_2_10_01')  |  float + 0.34 ) }}"

    cheapest_hours_energy_tomorrow:
      device_class: timestamp
      friendly_name: Cheapest sequential electricity hours
      value_template: >
        {%- set numberOfSequentialHours = 3 -%}
        {%- set lastHour = 23 -%}
        {%- set firstHour = 0 -%}

        {%- if state_attr('sensor.nordpool_kwh_fi_eur_3_10_024', 'tomorrow_valid') == true -%}
          {%- set ns = namespace(counter=0, list=[], cheapestHour=today_at("00:00") + timedelta( hours = (24)), cheapestPrice=999.00) -%}
          {%- for i in range(firstHour + numberOfSequentialHours, lastHour+1) -%}
            {%- set ns.counter = 0.0 -%}
            {%- for j in range(i-numberOfSequentialHours, i) -%}
              {%- set ns.counter = ns.counter + state_attr('sensor.nordpool_kwh_fi_eur_3_10_024', 'tomorrow')[j] -%}
            {%- endfor -%}
            {%- set ns.list = ns.list + [ns.counter] -%}
            {%- if ns.counter < ns.cheapestPrice -%}
              {%- set ns.cheapestPrice = ns.counter -%}
              {%- set ns.cheapestHour = today_at("00:00") + timedelta( hours = (24 + i - numberOfSequentialHours)) -%}
            {%- endif -%}
          {%- endfor -%}
          {{ ns.cheapestHour }}
          {%- set ns.cheapestPrice = ns.cheapestPrice / numberOfSequentialHours -%}
        {%- endif -%}
[...]