# Example configuration entry
template:
- trigger:
- platform: time_pattern
# This will update every night
hours: 0
minutes: 0
sensor:
# Keep track how many days have past since a date
- name: "Not smoking"
state: '{{ ( ( as_timestamp(now()) - as_timestamp(strptime("06.07.2018", "%d.%m.%Y")) ) / 86400 ) | round(default=0) }}'
unit_of_measurement: "Days"
See https://www.home-assistant.io/integrations/template/#configuration-variables