Allow plugins to be autoupdated only during specific days and times

auto_update_specific_times.php

<?php
/*
Plugin Name: Plugin Autoupdate Filter
Plugin URI: https://gist.github.com/NickGreen/a66d349575cf9e78c6dafd92efa5288a/edit
Description: Plugin which sets plugin autoupdates to always on, but only happen during specific times.
Version: 1.0
Author: Nick Green
Author URI:
License: GPLv3
*/


function auto_update_specific_times ( $update, $item ) {

  // Set these to run in U.S. Eastern time zone, which is most of our business hours
  date_default_timezone_set('America/New_York');

  $start = "09"; // 9am
  $end = "14"; // 2pm

  $hour = date('H'); // Current hour
  $day = date('D');  // Current day of the week

  // If outside business hours, disable auto-updates
  if ( $hour < $start || $hour > $end || 'Sat' == $day  || 'Sun' == $day )
  {
    return false;
  }

  // Otherwise, plugins will autoupdate regardless of settings in wp-admin
  return true;
}
add_filter( 'auto_update_plugin', 'auto_update_specific_times', 10, 2 );

if ( is_admin() ) {
  add_action( 'current_screen', 'plugins_page_code' );

  // Run code on the admin plugins page only
  function plugins_page_code() {
    $currentScreen = get_current_screen();
    if( $currentScreen->id === "plugins" ) {
      function translate_update_text( $translated_text, $text, $domain ) {
        switch ( $translated_text ) {
          case 'Auto-updates disabled' :
          $translated_text = __( 'Auto-updates enabled during business hours', '' );
          break;
        }
        return $translated_text;
      }
      add_filter( 'gettext', 'translate_update_text', 20, 3 );
    }
  }
}