Might mention the date_time sensor

[johnny-co]

sensor.date_time is used in notify triggers, needs the configuration.yaml entry
sensor:

• platform: time_date
  display_options:
  • 'time'
  • 'date'
  • 'date_time'
  • 'date_time_utc'
  • 'date_time_iso'
  • 'time_date'
  • 'time_utc'
  • 'beat'

[scarpazza]

Good catch!