how to get only date in grid view after select the datepicker?

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C#

i need to display only date in grid view but i am getting with time..

i am getting like this "9/22/2014 12:00:00 AM"

code is,

protected void btnSave_OnClick(object sender, EventArgs e)
       {

           var objMessage = new ResourceMessage();
           var objHolidayBal = new HolidayBAL();
           var objHolidayBe = new HolidayBE
           {
               Holiday = txtHolidayName.Text.Trim(),
               HolidayDate = txtHolidayDate.Text.Trim() != "" ? Convert.ToDateTime(Convert.ToDateTime(txtHolidayDate.Text).ToString("d")) : DateTime.Now,
               Description = txtDescription.Text.Trim()
           };

           string number = objHolidayBal.InsertHoliday(objHolidayBe);

           string messages = objMessage.GenerateMessage(Convert.ToInt32(number ?? "0"), "Holiday", "inserted");

           ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "successscript", "alert('" + messages + "');", true);
           GetAllHoliday();
       }