public partial class Site : System.Web.UI.MasterPage
{
    //page load event
    protected void Page_Load(object sender, EventArgs e)
    {
        //displaying current date on the label
        lblDate.Text = DateTime.Now.ToString();
    }
}

<header>
<h2>Two Column Layout.</h2>
<br />
<div id="displayDate">
<asp:Label runat="server" ID="lblDate" />
</div>

<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Site.master.cs" Inherits="MillerDylanTwoColumn.site" %>