public UTCDate getCurrentMonth() {
        return getModel().getCurrentMonth();
    }
Gets the current month the date picker is showing.

<p>
A datepicker <b> may </b> show days not in the current month. It
<b>must</b> show all days in the current month.
</p>

@return the current month
stroom-core-client-widget/src/main/java/stroom/widget/datepicker/client/CustomDatePicker.java