/**
 * Create a schedule for a campaign - this is time the campaign will be sent out
 * @param $campaignId - Id of the campaign to be scheduled
 * @param $time - ISO 8601 formatted timestamp of when the campaign should be sent
 */
function createSchedule($campaignId, $time)
{
    $cc = new ConstantContact(APIKEY);
    $schedule = new Schedule();
    $schedule->scheduled_date = $time;
    return $cc->addEmailCampaignSchedule(ACCESS_TOKEN, $campaignId, $schedule);
}