prozorro_sale.jobber.state_machine.states.base

        # todo: fix this by chage models
        from prozorro_sale.jobber.models.base import Period

        app_tz = get_app_tz()
        now = datetime.now(app_tz)
        periods_conf = self.state_specs["periods"]
        period = calculate_period(self.model, period_name, periods_conf, now, app_tz)
        setattr(self.model.periods, period_name, Period(period))

    def setup_periods(self):
        periods_conf = self.state_specs["periods"]