esphome-docs/components/datetime/index.rst

Datetime Component
==================

.. seo::
    :description: Instructions for setting up datetime components in ESPHome.
    :image: folder-open.svg

ESPHome has support for components to create a datetime entity. A datetime entity
currently represents a date that can be set by the user/frontend.

.. note::

    Requires Home Assistant 2024.4 or newer.

.. _config-datetime:

Base Datetime Configuration
---------------------------

All datetime in ESPHome have a name and an optional icon.

.. code-block:: yaml

    # Example datetime configuration
    name: Date to check

    # Optional variables:
    icon: "mdi:calendar-alert"

Configuration variables:

- **name** (**Required**, string): The name for the datetime.

  .. note::

      If you have a :ref:`friendly_name <esphome-configuration_variables>` set for your device and
      you want the datetime to use that name, you can set ``name: None``.

- **icon** (*Optional*, icon): Manually set the icon to use for the datetime in the frontend.
- **internal** (*Optional*, boolean): Mark this component as internal. Internal components will
  not be exposed to the frontend (like Home Assistant). Only specifying an ``id`` without
  a ``name`` will implicitly set this to true.
- **disabled_by_default** (*Optional*, boolean): If true, then this entity should not be added to any client's frontend,
  (usually Home Assistant) without the user manually enabling it (via the Home Assistant UI).
  Defaults to ``false``.
- **entity_category** (*Optional*, string): The category of the entity.
  See https://developers.home-assistant.io/docs/core/entity/#generic-properties
  for a list of available options.
  Set to ``""`` to remove the default entity category.
- **time_id** (**Required**, :ref:`config-id`): The ID of the time entity. Automatically set
  to the ID of a time component if only a single one is defined.

MQTT Options:

- All other options from :ref:`MQTT Component <config-mqtt-component>`.

Time and DateTime Options:

- **on_time** (*Optional*, :ref:`automation`): Automation to run when the current datetime or time matches the current state.
  Only valid on ``time`` or ``datetime`` types.

Automation
----------

You can access the most recent state as a ``ESPTime`` object by ``id(datetime_id).state_as_esptime()``

.. _datetime-on_value:

``on_value``
************

This automation will be triggered when a new value is published. In :ref:`Lambdas <config-lambda>`
you can get the value as a ESPTime object from the trigger with ``x``.

.. code-block:: yaml

    datetime:
      - platform: template
        # ...
        on_value:
          then:
            - lambda: |-
                if(x.hour >= 12) {
                  ESP_LOGD("main", "Updated hour is later or equal to 12");
                } else {
                  ESP_LOGD("main", "Updated hour is earlier than 12");
                }

Configuration variables: See :ref:`Automation <automation>`.

Date Automation
---------------

.. _datetime-date_set_action:

``datetime.date.set`` Action
****************************

This is an :ref:`Action <config-action>` for setting a datetime date state.
The ``date`` provided can be in one of 3 formats:

.. code-block:: yaml

    # String date
    - datetime.date.set:
        id: my_date
        date: "2023-12-04"

    # Individual date parts
    - datetime.date.set:
        id: my_date
        date:
          year: 2023
          month: 12
          day: 4

    # Using a lambda
    - datetime.date.set:
        id: my_date
        date: !lambda |-
          // Return an ESPTime struct
          return {.day_of_month: 4, .month: 12, .year: 2023};

Configuration variables:

- **id** (**Required**, :ref:`config-id`): The ID of the datetime to set.
- **date** (**Required**, string, date parts, :ref:`templatable <config-templatable>`):
  The value to set the datetime to.



.. _datetime-lambda_calls:

lambda calls
************

From :ref:`lambdas <config-lambda>`, you can call several methods on all datetimes to do some
advanced stuff (see the full API Reference for more info).

- ``.make_call()``: Make a call for updating the datetime value.

  .. code-block:: cpp

      // Within lambda, set the date to 2024-02-25
      auto call = id(my_date).make_call();
      call.set_date("2024-02-25");
      call.perform();

  Check the API reference for information on the methods that are available for
  the ``DateCall`` object.

- ``.year``: Retrieve the current year of the ``date``. It will be ``0`` if no value has been set.
- ``.month``: Retrieve the current month of the ``date``. It will be ``0`` if no value has been set.
- ``.day``: Retrieve the current day of the ``date``. It will be ``0`` if no value has been set.
- ``.state_as_esptime()``: Retrieve the current value of the datetime as a :apistruct:`ESPTime` object.

  .. code-block:: cpp

      // For example, create a custom log message when a value is received:
      ESP_LOGI("main", "Value of my datetime: %04d-%02d-%02d", id(my_date).year, id(my_date).month, id(my_date).day);

Time Automation
---------------

.. _datetime-time_set_action:

``datetime.time.set`` Action
****************************

This is an :ref:`Action <config-action>` for setting a datetime time state.
The ``time`` provided can be in one of 3 formats:

.. code-block:: yaml

    # String time
    - datetime.time.set:
        id: my_time
        time: "12:34:56"

    # Individual time parts
    - datetime.time.set:
        id: my_time
        time:
          hour: 12
          minute: 34
          second: 56

    # Using a lambda
    - datetime.time.set:
        id: my_time
        time: !lambda |-
          // Return an ESPTime struct
          return {.second: 56, .minute: 34, .hour: 12};

Configuration variables:

- **id** (**Required**, :ref:`config-id`): The ID of the datetime to set.
- **time** (**Required**, string, time parts, :ref:`templatable <config-templatable>`):
  The value to set the datetime to.


.. _datetime-time-lambda_calls:

lambda calls
************

From :ref:`lambdas <config-lambda>`, you can call several methods on all datetimes to do some
advanced stuff (see the full API Reference for more info).

- ``.make_call()``: Make a call for updating the datetime value.

  .. code-block:: cpp

      // Within lambda, set the time to 12:34:56
      auto call = id(my_time).make_call();
      call.set_time("12:34:56");
      call.perform();

  Check the API reference for information on the methods that are available for
  the ``TimeCall`` object.

- ``.hour``: Retrieve the current hour of the ``time``. It will be ``0`` if no value has been set.
- ``.minute``: Retrieve the current minute of the ``time``. It will be ``0`` if no value has been set.
- ``.second``: Retrieve the current second of the ``time``. It will be ``0`` if no value has been set.
- ``.state_as_esptime()``: Retrieve the current value of the datetime as a :apistruct:`ESPTime` object.

  .. code-block:: cpp

      // For example, create a custom log message when a value is received:
      ESP_LOGI("main", "Value of my datetime: %0d:%02d:%02d", id(my_time).hour, id(my_time).minute, id(my_time).second);


DateTime Automation
-------------------

.. _datetime-datetime_set_action:

``datetime.datetime.set`` Action
********************************

This is an :ref:`Action <config-action>` for setting a datetime datetime state.
The ``datetime`` provided can be in one of 3 formats:

.. code-block:: yaml

    # String datetime
    - datetime.time.set:
        id: my_datetime
        datetime: "2024-12-31 12:34:56"

    # Individual datetime parts
    - datetime.datetime.set:
        id: my_datetime
        datetime:
          year: 2024
          month: 12
          day: 31
          hour: 12
          minute: 34
          second: 56

    # Using a lambda
    - datetime.datetime.set:
        id: my_datetime
        datetime: !lambda |-
          // Return an ESPTime struct
          return {.second: 56, .minute: 34, .hour: 12, .day_of_month: 31, .month: 12, .year: 2024};

Configuration variables:

- **id** (**Required**, :ref:`config-id`): The ID of the datetime to set.
- **datetime** (**Required**, string, datetime parts, :ref:`templatable <config-templatable>`):
  The value to set the datetime to.


.. _datetime-datetime-lambda_calls:

Lambda calls
************

For more complex use cases, several methods are available for use on datetimes from within :ref:`lambdas <config-lambda>`. See the full API Reference for more information.

- ``.make_call()``: Make a call for updating the datetime value.

  .. code-block:: cpp

      // Within lambda, set the datetime to 2024-12-31 12:34:56
      auto call = id(my_datetime).make_call();
      call.set_date("2024-12-31 12:34:56");
      call.perform();

  Check the API reference for information on the methods that are available for
  the ``DateTimeCall`` object.

- ``.year``: Retrieve the current year of the ``datetime``. It will be ``0`` if no value has been set.
- ``.month``: Retrieve the current month of the ``datetime``. It will be ``0`` if no value has been set.
- ``.day``: Retrieve the current day of the ``datetime``. It will be ``0`` if no value has been set.
- ``.hour``: Retrieve the current hour of the ``datetime``. It will be ``0`` if no value has been set.
- ``.minute``: Retrieve the current minute of the ``datetime``. It will be ``0`` if no value has been set.
- ``.second``: Retrieve the current second of the ``datetime``. It will be ``0`` if no value has been set.
- ``.state_as_esptime()``: Retrieve the current value of the datetime as a :apistruct:`ESPTime` object.

  .. code-block:: cpp

      // For example, create a custom log message when a value is received:
      ESP_LOGI("main", "Value of my datetime: %04d-%02d-%02d %0d:%02d:%02d",
               id(my_datetime).year, id(my_datetime).month, id(my_datetime).day,
               id(my_datetime).hour, id(my_datetime).minute, id(my_datetime).second);


See Also
--------

- :apiref:`DateTimeBase <datetime/datetime_base.h>`
- :apiref:`DateEntity <datetime/date_entity.h>`
- :apiref:`DateCall <datetime/date_entity.h>`
- :apiref:`TimeEntity <datetime/time_entity.h>`
- :apiref:`TimeCall <datetime/time_entity.h>`
- :apiref:`DateTimeEntity <datetime/datetime_entity.h>`
- :apiref:`DateTimeCall <datetime/datetime_entity.h>`
- :ghedit:`Edit`

.. toctree::
    :maxdepth: 1
    :glob:

    *