first commit

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

@@ -0,0 +1,28 @@
+<?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' );