date validation

Question

Hello.. i have use the compare validator to validate the date...

<tr>
<%-- Birthdate --%>
<td align="right" style="width: 156px">
<asp:Label ID="lblbdate" Text="Birthdate(dd/mm/yyyy)" runat="server"></td>
<td>
<asp:TextBox runat="server" ID="txtbdate" autocomplete="true" /><br /> 
<asp:CompareValidator ID="cmpbdate" runat="server" ControlToValidate="txtbdate" ErrorMessage="Invalid Date" Operator="DataTypeCheck" Text="#" Type="Date" Font-Size="Smaller"/>
<cc1:CalendarExtender ID="defaultCalendarExtender" runat="server"
TargetControlID="txtbdate" DaysModeTitleFormat="dd MMMM,YYYY" TodaysDateFormat="dd/MM/ yyyy" DefaultView="Years" />
</td>
</tr>

but it use the format dd/mm/yyyy.. and when we select date from ajax CalendarExtender that enter date in mm/dd/yyyy format...
 
so how to change date format of either comare validator.. or ajax CalendarExtender