Problem with f:convertDateTime Component giving the day before the correct one

If you have a date field in a database and use a outputText with a convertDateTime component embedded in it it displays the date incorrectly - 1 day earlier than the correct date in the database.
If i use the t:inputCalender to display the same date, it displays the correct date that is stored in the database.
-------------------------
<h:outputLabel styleClass="outputLabel" for="review_date" value="#

{msgs.review_date}"/>
<h:outputText id="review_date" value="#{RisksBBB.entity.review_date}">
<f:convertDateTime/>
</h:outputText>
<h:message styleClass="message" for="review_date"/>
<h:outputLabel styleClass="outputLabel" for="review_dated" value="#{msgs.review_date}

"/>
<t:inputDate popupCalendar="true" id="review_dated" value="#

{RisksBBB.entity.review_date}

"/>
<h:message styleClass="message" for="review_dated"/>

Gives 17-Aug-2006 from tthe outputText but 18-Aug-2006 in the calendar control.