Add date entity developer docs (#1533)

Co-authored-by: Franck Nijhof <frenck@frenck.nl>
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Raman Gupta 2023-04-30 14:35:06 -04:00 committed by GitHub
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---
title: Date Entity
sidebar_label: Date
---
A `date` is an entity that allows the user to input a date to an integration. Derive entity platforms from [`homeassistant.components.date.DateEntity`](https://github.com/home-assistant/core/blob/dev/homeassistant/components/date/__init__.py)
## Properties
:::tip
Properties should always only return information from memory and not do I/O (like network requests). Implement `update()` or `async_update()` to fetch data.
:::
| Name | Type | Default | Description
| ---- | ---- | ------- | -----------
| native_value | date | **Required** | The value of the date.
Other properties that are common to all entities such as `icon`, `name` etc are also applicable.
## Methods
### Set value
Called when the user or an automation wants to update the value.
```python
class MyDate(DateEntity):
# Implement one of these methods.
def set_value(self, value: date) -> None:
"""Update the current value."""
async def async_set_value(self, value: date) -> None:
"""Update the current value."""
```