Formatar data em h:selectOneMenu / Formatar data em f:selectItems

<h:outputText value="Data" />
<h:selectOneMenu value="#{funcionarioMB.ausencia.int_ferias}">
   <f:selectItem noSelectionOption="true" itemValue="" />
   <f:selectItems value="#{funcionarioMB.funcionario.ferias}" var="ferias" itemValue="#{ferias.int_id}"      itemLabel="#{dateUtil.formatDate(ferias.dt_periodoaquisitivoinicio,'dd/MM/yyyy')}" />
</h:selectOneMenu>

 public static String formatDate(Date date, String pattern) {

     if (date == null) {

         return null;

     }

     if (pattern == null) {

         throw new NullPointerException("pattern");

     }

     Locale locale = FacesContext.getCurrentInstance().getViewRoot().getLocale();

     return new SimpleDateFormat(pattern, locale).format(date);

}