Showing only Day instead of date_time

Configuration
1

May be simple enough, but not finding a way to show just the day (24, for example) instead of full date on main page.

Relevant section of configuration.yaml would be hugely appreciated.

2

Not sure where exactly you mean on the main page, do you have a custom card? I think you’ll need strftime

this will give you the day of the month: (use %d for a zero padded number)

    {{ now().strftime("%-d") }}
3

An existing yaml entry is as follows, please tell how should it look after incorporating your suggested modifications.

sensor:

  • platform: time_date
    display_options:
    • ‘time’
    • ‘date’

Apologies for being so ignorant. Characters are being messed up by html formatting.

4

There might be a better way, but I would use a template sensor for this, eg:

  - platform: template
    sensors:
      day_of_month:
        friendly_name: "Day"
        value_template: "{{ now().strftime('%-d') }}"
5

I am getting the following error. Not sure if it matters (I am almost certain it doesn’t), but I am running this on Windows 10.

2018-06-24 23:05:51 ERROR (MainThread) [homeassistant.helpers.entity] Update for sensor.day_of_month fails
Traceback (most recent call last):
File “C:\Users\comp\AppData\Local\Programs\Python\Python36\lib\site-packages\homeassistant\helpers\entity.py”, line 204, in async_update_ha_state
yield from self.async_device_update()
File “C:\Users\comp\AppData\Local\Programs\Python\Python36\lib\site-packages\homeassistant\helpers\entity.py”, line 325, in async_device_update
yield from self.async_update()
File “C:\Users\comp\AppData\Local\Programs\Python\Python36\lib\asyncio\coroutines.py”, line 212, in coro
res = func(*args, **kw)
File “C:\Users\comp\AppData\Local\Programs\Python\Python36\lib\site-packages\homeassistant\components\sensor\template.py”, line 184, in async_update
self._state = self._template.async_render()
File “C:\Users\comp\AppData\Local\Programs\Python\Python36\lib\site-packages\homeassistant\helpers\template.py”, line 132, in async_render
return self._compiled.render(kwargs).strip()
File “C:\Users\comp\AppData\Local\Programs\Python\Python36\lib\site-packages\jinja2\asyncsupport.py”, line 76, in render
return original_render(self, *args, **kwargs)
File “C:\Users\comp\AppData\Local\Programs\Python\Python36\lib\site-packages\jinja2\environment.py”, line 1008, in render
return self.environment.handle_exception(exc_info, True)
File “C:\Users\comp\AppData\Local\Programs\Python\Python36\lib\site-packages\jinja2\environment.py”, line 780, in handle_exception
reraise(exc_type, exc_value, tb)
File “C:\Users\comp\AppData\Local\Programs\Python\Python36\lib\site-packages\jinja2_compat.py”, line 37, in reraise
raise value.with_traceback(tb)
File “”, line 1, in top-level template code
File “C:\Users\comp\AppData\Local\Programs\Python\Python36\lib\site-packages\jinja2\sandbox.py”, line 427, in call
return __context.call(__obj, *args, **kwargs)
ValueError: Invalid format string

And my yaml is as follows:

  - platform: template
    sensors:
      day_of_month:
        friendly_name: "Day"
        value_template: "{{ now().strftime('%0d') }}"
6

%0d is an invalid format type, try %d

7

Yes. Noticed after posting. Removed. Works fine. Thank you very much for all your help and support. Truly appreciated.

1 Like
8

fyi that value template will never update because you don’t have an entity_id attached to it. Templates only update when state changes occur to a states object. now() is not a states object. You need to add an entity_id to your template, something that updates every day. Doesn’t matter what:

  - platform: template
    sensors:
      day_of_month:
        friendly_name: "Day"
        value_template: "{{ now().strftime('%0d') }}"
        entity_id: light.some_light_that_turns_on_every_day

@mvdarend Also, as an FYI ‘%0d’ is a valid template. It will add a leading zero to days under 10, example 09 for the 9th day.

9

Are you sure? According to the documentation here %d has a leading zero and %-d doesn’t. (%0d isn’t listed)

Thanks for the tip on entity_id, I hadn’t thought of that.

10

yeah, that’s pythons strfttime. This strftime supported in the templates doesn’t support alot of pythons functionalities. For example the “%-d” doesn’t work in templates. That one really annoys the shit out of me because I use it all the time in python. Anyways, I have to always double check what the templates do with strftime because it’s different:

Capture

Capture

1 Like