    def get_dates(self):
        today = datetime.date.today()
        day = today
        if 'week_start' in self.request.GET:
            param = self.request.GET.get('week_start')
            try:
                day = datetime.datetime.strptime(param, '%Y-%m-%d').date()
            except:
                pass
        week_start = utils.get_week_start(day)
        week_end = week_start + relativedelta(days=6)
        return today, week_start, week_end