HASS Jinja2 Date/Time Macros

add_time()

{% macro add_time(time, add_minutes) %}
  {% if time|lower != 'unavailable' %}
    {% set time = time.split(':') %}
    {% set hour = time[0]|int %}
    {% set minutes = time[1]|int %}
    {% if (minutes + add_minutes) < 60 %}
      {{ "%0.02d:%0.02d"|format(hour, minutes + add_minutes) }}
    {% else %}
      {{ "%0.02d:%0.02d"|format(hour + 1, (minutes + add_minutes) - 60) }}
    {% endif %}
  {% endif %}
{% endmacro %}


# Trigger the automation 5 minutes after the wakeup time.
{% set add_minutes = 5 %}
{% set current_time = states('sensor.time') %}
{% set boys = add_time(states('sensor.boys_room_next_alarm'),add_minutes) %}
{% set brian = add_time(states('sensor.wakeup_brian_time'),add_minutes) %}

{{ current_time in [boys,brian] }}

between hours

- service: media_player.volume_set
  entity_id: media_player.family_room_speaker
  data_template:
    volume_level: >
      {% if now().strftime("%H")|int < 12 and now().strftime("%H")|int > 6%}
      0.25
      {% elif now().strftime("%H")|int > 12 and now().strftime("%H")|int < 17%}
      0.40
      {% else %}
      0.20
      {% endif %}

dayofweek_number(dayofweek)

{%- macro dayofweek_number(dayofweek) -%}
  {%- if dayofweek == "Sunday" or dayofweek == "Sun" -%}
    1
  {%- elif dayofweek == "Monday" or dayofweek == "Mon" -%}
    2
  {%- elif dayofweek == "Tuesday" or dayofweek == "Tue" -%}
    3
  {%- elif dayofweek == "Wednesday" or dayofweek == "Wed" -%}
    4
  {%- elif dayofweek == "Thursday" or dayofweek == "Thu" -%}
    5
  {%- elif dayofweek == "Friday" or dayofweek == "Fri" -%}
    6
  {%- elif dayofweek == "Saturday" or dayofweek == "Sat" -%}
    7
  {%- endif -%}
{%- endmacro -%}

get_nth_dayofmonth(nth, dayofweek, month, year)

{%- macro get_nth_dayofmonth(nth, dayofweek, month, year=now().strftime("%Y")) -%}
  {%- set dayofweek = dayofweek_number(dayofweek)|int -%}
  {%- set firstdateofmonth = strptime(year ~"-"~ month ~"-1", "%Y-%m-%d") -%}
  {%- set firstdayofmonth = dayofweek_number(firstdateofmonth.strftime("%A"))|int -%}

  {# Determine the first occurrence of the day. #}
  {%- if firstdayofmonth == 1 -%}
    {%- set firstoccurrence = dayofweek -%}
  {%- elif firstdayofmonth < dayofweek -%}
    {%- set firstoccurrence = (dayofweek - dayofweek_number(firstdayofmonth)) -%}
  {%- else -%}
    {%- set firstoccurrence = (7 - firstdayofmonth + dayofweek) + 1 -%}
  {%- endif -%}

  {%- if nth is number -%}
    {# Determine the nth occurrence of the dayofweek. #}
    {%- set nthoccurrence = firstoccurrence + 7 * (nth-1) -%}
  {%- else -%}
    {#
    Determine the LAST occurrence of the dayofweek.

    Reference: https://cflib.org/udf/GetLastOccOfDayInMonth
    #}
    {%- set lastdayofmonth = last_dayofmonth(month, year)|int -%}
    {%- set lastdayname = strptime(year ~"-"~ month ~"-"~ lastdayofmonth, "%Y-%m-%d").strftime("%A") -%}
    {%- set lastdaynumber = dayofweek_number(lastdayname)|int -%}
    {%- set daydifference = lastdaynumber - dayofweek -%}

    {# Add a week if the result is negative. #}
    {%- if daydifference < 0 -%}
      {%- set daydifference = daydifference + 7 -%}
    {%- endif -%}

    {%- set nthoccurrence = lastdayofmonth - daydifference -%}
  {%- endif -%}

  {# Return the day with the month and year so it can be useful. #}
  {{ strptime(month ~"/"~ nthoccurrence ~"/"~ year, "%m/%d/%Y") }}
{%- endmacro -%}

last_dayofmonth(month, year)

{%- macro last_dayofmonth(month, year) -%}
  {%- set daysinmonths = [31,28,31,30,31,30,31,31,30,31,30,31] -%}
  {%- set month = month|int -%}
  {%- set year = year|int -%}

  {# Simplified leap year calculation. See https://www.mathsisfun.com/leap-years.html #}
  {%- set isleapyear = year % 4 == 0 and (year % 100 != 0 or year % 400 == 0) -%}

  {%- set monthindex = month-1 -%}
  {%- if month == 2 and isleapyear -%}
    {{ daysinmonths[monthindex]+1 }}
  {%- else -%}
    {{ daysinmonths[monthindex] }}
  {%- endif -%}
{%- endmacro -%}

subtract_time()

{% macro subtract_time(time, subtract_minutes) %}
  {% if time|lower != 'unavailable' %}
    {% set time = time.split(':') %}
    {% set hour = time[0]|int %}
    {% set minutes = time[1]|int %}
    {% if (minutes|int >= subtract_minutes) %}
      {{ "%0.02d:%0.02d"|format(hour, minutes - subtract_minutes) }}
    {% else %}
      {{ "%0.02d:%0.02d"|format(hour - 1, minutes + (60-subtract_minutes)) }}
    {% endif %}
  {% endif %}
{% endmacro %}

# Trigger the automation 30 minutes before the wakeup time.
{% set subtract_minutes = 30 %}
{% set current_time = states('sensor.time') %}
{% set boys = subtract_time(states('sensor.boys_room_next_alarm'),subtract_minutes) %}
{% set brian = subtract_time(states('sensor.wakeup_brian_time'),subtract_minutes) %}

{{ current_time in [boys,brian] }}

time differences

{% set seconds_difference = (as_timestamp(now()) - as_timestamp(last_update)) %}
{% set minutes_difference = (seconds_difference) / 60 %}
{% set hours_difference   = (seconds_difference) / 3600 %}