WordPress Plugin, that set the time that the cookie will be kept at 1 year and active the 'Rember Me' Checkbox for default

keep_me_logged_in_for_1_year.php

<?php
/**
 * Plugin Name: Keep me Logged In for 1 Year
 * Plugin URI:  https://bueltge.de/wordpress-login-unterbinden/1220/
 * Description: Set the time that the cookie will be kept at 1 year.
 * Version:     0.0.3
 * Author:      Frank Bültge
 * Author URI:  https://bueltge.de/
 */

! defined( 'ABSPATH' ) && exit;

// Filters the duration of the authentication cookie expiration period.
add_filter( 'auth_cookie_expiration', function( $expirein ) {
	return  31556926; // 1 year in seconds
} );

// Fires in the login page footer.
add_filter( 'login_footer', function() {
	?>
	<script type="text/javascript">
	document.getElementById( 'rememberme' ).checked = true;
	document.getElementById( 'wp-submit' ).focus();
	</script>
	<?php
} );