Modifying the 'next alarm' sensor data before sending it to a text helper

[Hellis81]

You can use:

{{ (state_attr('sensor.note_20_next_alarm', 'Time in Milliseconds')/1000) | timestamp_custom("%A %H:%M")}}

Or you could have a look at:

"human friendly" template for next alarm (companion app)

I don’t like the timestamp format used by the app(s) so I first did a simple Y-m-d H:m format, but even that looked unnatural. 2020-09-30… instead of just “tomorrow”. So I decided to build a template that makes a human friendly format. Unavailable is replaced with “No alarm” “Today hh:mm” “Tomorrow hh:mm” “Monday hh:mm” (where monday is in local language) “2020-10-05 hh:mm” if the date is more than a week away of course the actual format can be changed. The first five lines is the part tha…