How to disable Date's in Calendar Control

How to disable Date's in Calendar Control? 

for example: disable the date from May 1-10, 2018

<asp:TextBox ID="date" runat="server" AutoPostBack="true" CssClass="form-control" placeholder="Date" Width="20%" OnTextChanged="date_TextChanged"></asp:TextBox>
<asp:CalendarExtender ID="c_date" runat="server" Format="dd-MMM-yyyy" TargetControlID="date">
</asp:CalendarExtender>