function wp_unschedule_event( $timestamp, $hook, $args = array() ) {
  // Make sure timestamp is a positive integer.
  if ( ! is_numeric( $timestamp ) || $timestamp <= 0 ) {
    return false;
  }

  
/**
 * Filter to preflight or hijack unscheduling of events.
 *
 * Returning a non-null value will short-circuit the normal unscheduling
 * process, causing the function to return the filtered value instead.
 *
 * For plugins replacing wp-cron, return true if the event was successfully
 * unscheduled, false if not.
 *
 * @since 5.1.0
 *
 * @param null|bool $pre       Value to return instead. Default null to continue unscheduling the event.
 * @param int       $timestamp Timestamp for when to run the event.
 * @param string    $hook      Action hook, the execution of which will be unscheduled.
 * @param array     $args      Arguments to pass to the hook's callback function.
 */
  $pre = apply_filters( 'pre_unschedule_event', null, $timestamp, $hook, $args );
  if ( null !== $pre ) {
    return $pre;
  }

  $crons = _get_cron_array();
  $key   = md5( serialize( $args ) );
  unset( $crons[ $timestamp ][ $hook ][ $key ] );
  if ( empty( $crons[ $timestamp ][ $hook ] ) ) {
    unset( $crons[ $timestamp ][ $hook ] );
  }
  if ( empty( $crons[ $timestamp ] ) ) {
    unset( $crons[ $timestamp ] );
  }
  return _set_cron_array( $crons );
}