Disable previous Dates in Input Type Date (TextMode Date) using jQuery in ASP.Net

Hi nauna,

To disable previous dates use min attribute.

Check this example. Now please take its reference and correct your code.

HTML

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript">
    $(function () {
        var today = new Date();
        var month = ('0' + (today.getMonth() + 1)).slice(-2);
        var day = ('0' + today.getDate()).slice(-2);
        var year = today.getFullYear();
        var date = year + '-' + month + '-' + day;
        $('[id*=txtdateofreservation]').attr('min', date);
    });
</script>
<asp:TextBox ID="txtdateofreservation" runat="server" TextMode="Date"></asp:TextBox>

Screenshot