dst:
  friendly_name: Daylight Savings Times
  device_class: timestamp
  value_template: >
    {%- set ns = namespace(previous = 2, spring=none, fall=none) %}
    {%- set today = strptime(states('sensor.date'), '%Y-%m-%d').astimezone().replace(hour=ns.previous) %}
    {%- for i in range(365) %}
      {%- set day = (today + timedelta(days=i)).astimezone() %}
      {%- if ns.previous - day.hour == -1 %}
        {%- set ns.spring = today + timedelta(days=i) | timestamp_local %}
      {%- elif ns.previous - day.hour == 1 %}
        {%- set ns.fall = today + timedelta(days=i) | timestamp_local %}
      {%- endif %}
      {%- set ns.previous = day.hour %}
    {%- endfor %}
    {{ [ns.spring, ns.fall] | min }}
  attribute_templates:
    is_dst_active: >
      {{ now().timetuple().tm_isdst > 0 }}
    dst_change_tomorrow: >
      {% set dt = now() + timedelta(days=1) %}
      {{ now().astimezone().tzinfo != dt.astimezone().tzinfo }}
    next: >
      {%- set ns = namespace(previous = 2, spring=none, fall=none) %}
      {%- set today = strptime(states('sensor.date'), '%Y-%m-%d').astimezone().replace(hour=ns.previous) %}
      {%- for i in range(365) %}
        {%- set day = (today + timedelta(days=i)).astimezone() %}
        {%- if ns.previous - day.hour == -1 %}
          {%- set ns.spring = today + timedelta(days=i) %}
        {%- elif ns.previous - day.hour == 1 %}
          {%- set ns.fall = today + timedelta(days=i) %}
        {%- endif %}
        {%- set ns.previous = day.hour %}
      {%- endfor %}
      {%- set next = [ns.spring, ns.fall] | min %}
      {%- set phrase = 'lose an hour' if next == ns.spring else 'gain an hour' %}
      {"spring": "{{ns.spring}}", "fall": "{{ns.fall}}", "event": "{{next}}", "days_to_event":{{(next-today).days}}, "phrase": "{{phrase}}"}