Spatie\GoogleCalendar\Event::setDateProperty PHP Method

    protected function setDateProperty(string $name, Carbon $date)
    {
        $eventDateTime = new Google_Service_Calendar_EventDateTime();
        if (in_array($name, ['start.date', 'end.date'])) {
            $eventDateTime->setDate($date->format('Y-m-d'));
            $eventDateTime->setTimezone($date->getTimezone());
        }
        if (in_array($name, ['start.dateTime', 'end.dateTime'])) {
            $eventDateTime->setDateTime($date->format(DateTime::RFC3339));
            $eventDateTime->setTimezone($date->getTimezone());
        }
        if (starts_with($name, 'start')) {
            $this->googleEvent->setStart($eventDateTime);
        }
        if (starts_with($name, 'end')) {
            $this->googleEvent->setEnd($eventDateTime);
        }
    }