get_comment_date( string $format = '', int|WP_Comment $comment_ID )
Retrieves the comment date of the current comment.
Parameters
- $format
 -  
(string) (Optional) PHP date format. Defaults to the 'date_format' option.
Default value: ''
 - $comment_ID
 -  
(int|WP_Comment) (Optional) WP_Comment or ID of the comment for which to get the date. Default current comment.
 
Return
(string) The comment's date.
More Information
The date format can be in a format specified in Formatting Date and Time
Source
File: wp-includes/comment-template.php
function get_comment_date( $format = '', $comment_ID = 0 ) {
	$comment = get_comment( $comment_ID );
	$_format = ! empty( $format ) ? $format : get_option( 'date_format' );
	$date = mysql2date( $_format, $comment->comment_date );
	/**
	 * Filters the returned comment date.
	 *
	 * @since 1.5.0
	 *
	 * @param string|int $date    Formatted date string or Unix timestamp.
	 * @param string     $format  PHP date format.
	 * @param WP_Comment $comment The comment object.
	 */
	return apply_filters( 'get_comment_date', $date, $format, $comment );
}  Changelog
| Version | Description | 
|---|---|
| 4.4.0 | Added the ability for $comment_ID to also accept a WP_Comment object. |  
| 1.5.0 | Introduced. | 
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Licensed under the GNU GPLv2+ License.
    https://developer.wordpress.org/reference/functions/get_comment_date