get_comment_date( string $d = '', int|WP_Comment $comment_ID )

function get_comment_date( $d = '', $comment_ID = 0 ) {
	$comment = get_comment( $comment_ID );
	if ( '' == $d )
		$date = mysql2date(get_option('date_format'), $comment->comment_date);
	else
		$date = mysql2date($d, $comment->comment_date);
	/**
	 * Filters the returned comment date.
	 *
	 * @since WP-1.5.0
	 *
	 * @param string|int $date    Formatted date string or Unix timestamp.
	 * @param string     $d       The format of the date.
	 * @param WP_Comment $comment The comment object.
	 */
	return apply_filters( 'get_comment_date', $date, $d, $comment );
}