Title: WP_Widget_Calendar
Published: April 25, 2014
Last modified: May 20, 2026

---

# class WP_Widget_Calendar {}

## In this article

 * [Description](https://developer.wordpress.org/reference/classes/WP_Widget_Calendar/?output_format=md#description)
    - [See also](https://developer.wordpress.org/reference/classes/WP_Widget_Calendar/?output_format=md#see-also)
 * [Methods](https://developer.wordpress.org/reference/classes/WP_Widget_Calendar/?output_format=md#methods)
 * [Source](https://developer.wordpress.org/reference/classes/WP_Widget_Calendar/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/classes/WP_Widget_Calendar/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/classes/WP_Widget_Calendar/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/classes/WP_Widget_Calendar/?output_format=md#wp--skip-link--target)

Core class used to implement the Calendar widget.

## 󠀁[Description](https://developer.wordpress.org/reference/classes/WP_Widget_Calendar/?output_format=md#description)󠁿

### 󠀁[See also](https://developer.wordpress.org/reference/classes/WP_Widget_Calendar/?output_format=md#see-also)󠁿

 * [WP_Widget](https://developer.wordpress.org/reference/classes/wp_widget/)

## 󠀁[Methods](https://developer.wordpress.org/reference/classes/WP_Widget_Calendar/?output_format=md#methods)󠁿

| Name | Description | 
| [WP_Widget_Calendar::__construct](https://developer.wordpress.org/reference/classes/wp_widget_calendar/__construct/) | Sets up a new Calendar widget instance. | 
| [WP_Widget_Calendar::form](https://developer.wordpress.org/reference/classes/wp_widget_calendar/form/) | Outputs the settings form for the Calendar widget. | 
| [WP_Widget_Calendar::update](https://developer.wordpress.org/reference/classes/wp_widget_calendar/update/) | Handles updating settings for the current Calendar widget instance. | 
| [WP_Widget_Calendar::widget](https://developer.wordpress.org/reference/classes/wp_widget_calendar/widget/) | Outputs the content for the current Calendar widget instance. |

## 󠀁[Source](https://developer.wordpress.org/reference/classes/WP_Widget_Calendar/?output_format=md#source)󠁿

    ```php
    class WP_Widget_Calendar extends WP_Widget {
    	/**
    	 * Ensure that the ID attribute only appears in the markup once
    	 *
    	 * @since 4.4.0
    	 * @var int
    	 */
    	private static $instance = 0;

    	/**
    	 * Sets up a new Calendar widget instance.
    	 *
    	 * @since 2.8.0
    	 */
    	public function __construct() {
    		$widget_ops = array(
    			'classname'                   => 'widget_calendar',
    			'description'                 => __( 'A calendar of your site’s posts.' ),
    			'customize_selective_refresh' => true,
    			'show_instance_in_rest'       => true,
    		);
    		parent::__construct( 'calendar', __( 'Calendar' ), $widget_ops );
    	}

    	/**
    	 * Outputs the content for the current Calendar widget instance.
    	 *
    	 * @since 2.8.0
    	 *
    	 * @param array $args     Display arguments including 'before_title', 'after_title',
    	 *                        'before_widget', and 'after_widget'.
    	 * @param array $instance The settings for the particular instance of the widget.
    	 */
    	public function widget( $args, $instance ) {
    		$title = ! empty( $instance['title'] ) ? $instance['title'] : '';

    		/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
    		$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );

    		echo $args['before_widget'];
    		if ( $title ) {
    			echo $args['before_title'] . $title . $args['after_title'];
    		}
    		if ( 0 === self::$instance ) {
    			echo '<div id="calendar_wrap" class="calendar_wrap">';
    		} else {
    			echo '<div class="calendar_wrap">';
    		}
    		get_calendar();
    		echo '</div>';
    		echo $args['after_widget'];

    		++self::$instance;
    	}

    	/**
    	 * Handles updating settings for the current Calendar widget instance.
    	 *
    	 * @since 2.8.0
    	 *
    	 * @param array $new_instance New settings for this instance as input by the user via
    	 *                            WP_Widget::form().
    	 * @param array $old_instance Old settings for this instance.
    	 * @return array Updated settings to save.
    	 */
    	public function update( $new_instance, $old_instance ) {
    		$instance          = $old_instance;
    		$instance['title'] = sanitize_text_field( $new_instance['title'] );

    		return $instance;
    	}

    	/**
    	 * Outputs the settings form for the Calendar widget.
    	 *
    	 * @since 2.8.0
    	 *
    	 * @param array $instance Current settings.
    	 */
    	public function form( $instance ) {
    		$instance = wp_parse_args( (array) $instance, array( 'title' => '' ) );
    		?>
    		<p>
    			<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:' ); ?></label>
    			<input class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" type="text" value="<?php echo esc_attr( $instance['title'] ); ?>" />
    		</p>
    		<?php
    	}
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/widgets/class-wp-widget-calendar.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/widgets/class-wp-widget-calendar.php#L17)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-calendar.php#L17-L105)

## 󠀁[Related](https://developer.wordpress.org/reference/classes/WP_Widget_Calendar/?output_format=md#related)󠁿

| Uses | Description | 
| [WP_Widget](https://developer.wordpress.org/reference/classes/wp_widget/)`wp-includes/class-wp-widget.php` |

Core base class extended to register widgets.

  |

## 󠀁[Changelog](https://developer.wordpress.org/reference/classes/WP_Widget_Calendar/?output_format=md#changelog)󠁿

| Version | Description | 
| [2.8.0](https://developer.wordpress.org/reference/since/2.8.0/) | Introduced. |

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