<%@ Page Language="C#" %> protected void Page_Load(object sender, EventArgs e) { RangeValidator1.MinimumValue = DateTime.Now.ToShortDateString(); RangeValidator1.MaximumValue = DateTime.Now.AddDays(14).ToShortDateString(); } protected void Calendar1_SelectionChanged(object sender, EventArgs e) { TextBox1.Text = Calendar1.SelectedDate.ToShortDateString(); } protected void Button1_Click(object sender, EventArgs e) { if (Page.IsValid) { Label1.Text = "You are set to arrive on: " + TextBox1.Text.ToString(); } } Date Validation Check Arrival Date: runat="server" ErrorMessage="select a date within the next two weeks." ControlToValidate="TextBox1" Type="Date"> Select your arrival date: runat="server" OnSelectionChanged="Calendar1_SelectionChanged"> OnClick="Button1_Click" />