<md-form-field>
          <input readonly="true" mdInput [mdDatepicker]="regDatePicker" placeholder="{{'client.regdate-placeholder'}}">
          <md-datepicker-toggle mdSuffix [for]="regDatePicker"></md-datepicker-toggle>
          <md-datepicker #regDatePicker  startView="month" [startAt]="currentDate"></md-datepicker>
        </md-form-field>

public client: IPerson;
    @ViewChild("regDatePicker")
    public regDatePicker: MdDatepicker<Date>;

Can't bind to 'mdDatepicker' since it isn't a known property of 'input'