Device_class: date - Create date object

Configuration
1

Hi,

I want to output a date in a template but always get rendered invalid date.

How must I output my date (in this moment as string like ‘13.05.23’) to match the device_class date and the expected date object?

Thanks, Steffen

2
3

Thank you I know the instructions, but I haven’t had any success so far. That’s why I asked here …

4

My only timestamp template (copied from somewhere :roll_eyes:) is:

  - sensor:
      - name: "Last reboot"
        state: "{{ as_timestamp(states('sensor.last_boot')) | timestamp_custom('%d %B %Y at %H:%M') }}"

There’s a bit in the templating docs:

5

It would help considerably if you shared the template you are using, but basically ISO 8601 format. See the warning box at the end of this section : Templating - Home Assistant

6

I try many converts but did not find the right one but here is the template, but the only problem is how have the output must format for a device_class date. I think the device_class date must a special format and I do not know how to create it from a simple date string:

  sensor:
  - unique_id: tmp_nextdate_urlaubskalender
    name: tmp_nextdate_urlaubskalender
    device_class: date
    icon: mdi:calendar-search
    state: >-
      {% set nextoffset = namespace(found = false, offset = 999, date = '') %}
      {% for scheduler in integration_entities('scheduler') %}
        {% if 'Urlaub' in state_attr(scheduler,'tags') %}
          {% if not (state_attr(scheduler,'next_trigger') in ['unavailable', 'unknown', 'none']) %}
            {% set today = as_timestamp(now()) %}
            {% set next = as_timestamp(state_attr(scheduler,'next_trigger')) %}
            {% set offset = ((next-today)/86400) | round(0,'ceil') %}
            {% if offset < nextoffset.offset %}
              {% set nextoffset.found = true %}
              {% set nextoffset.offset = offset %}
              {% set nextoffset.date = next %}
            {% endif %}
          {% endif %}
        {% endif %}
      {% endfor %}
      {% if nextoffset.found == true %}
        {{- nextoffset.date | timestamp_custom('%d.%m.%y') -}}
      {% else %}
        {{- none -}}
      {% endif %}

Attention: Not device_class: timestamp only date!

7

I got is, very simple and I thinking complicated to create a object:

{{- nextoffset.date | timestamp_custom('%Y-%m-%d') -}}