get_post_datetime

	 * @since 0.71
	 *
	 * @param string $get_the_time The formatted time.
	 * @param string $format       The time format. Accepts 'G', 'U',
	 *                             or PHP date format.
	 */
	echo apply_filters( 'the_time', get_the_time( $format ), $format );
}

/**
 * Retrieve the time at which the post was written.
 *
 * @since 1.5.0
 *
 * @param string      $format Optional. Format to use for retrieving the time the post
 *                            was written. Either 'G', 'U', or PHP date format defaults
 *                            to the value specified in the time_format option. Default empty.
 * @param int|WP_Post $post   WP_Post object or ID. Default is global `$post` object.
 * @return string|int|false Formatted date string or Unix timestamp if `$format` is 'U' or 'G'.
 *                          False on failure.
 */
function get_the_time( $format = '', $post = null ) {
	$post = get_post( $post );

	if ( ! $post ) {
		return false;
	}

	$_format = ! empty( $format ) ? $format : get_option( 'time_format' );