first commit

wp-content/plugins/mailchimp-for-wp/includes/admin/migrations/3.0.3-usage-tracking-schedule.php

@@ -0,0 +1,29 @@
+<?php
+defined('ABSPATH') or exit;
+
+$options = (array) get_option('mc4wp', array());
+if (empty($options['allow_usage_tracking'])) {
+    return;
+}
+
+// usage tracking is enabled, reschedule it so it uses new cron schedule.
+
+// make sure 'monthly' cron schedule is registered
+/**
+ * @ignore
+ */
+function _mc4wp_303_add_monthly_cron_schedule($schedules)
+{
+    $schedules['monthly'] = array(
+        'interval' => 30 * DAY_IN_SECONDS,
+        'display' => 'Once a month'
+    );
+
+    return $schedules;
+}
+
+add_filter('cron_schedules', '_mc4wp_303_add_monthly_cron_schedule', 1);
+
+// reschedule usage tracking event
+wp_clear_scheduled_hook('mc4wp_usage_tracking');
+wp_schedule_event(time(), 'monthly', 'mc4wp_usage_tracking');