Display Full Month name in dddd dd MM Date Format in ASP.Net

i have a event page that displays all upcoming birthdays,

if birthday is today--it will display today,if tomorrow it will display tomorrow..i for other month birthdays i want to display month name also..my code is like this

            if (bthday == DateTime.Today.Date.ToShortDateString())
            {
                lblDate.Text = "Today";
            }
            else if (bthday== DateTime.Today.AddDays(1).ToShortDateString())
            {
                lblDate.Text = "Tomorrow";
            }
            else
            {
                lblDate.Text = dt1.ToString("dddd dd, MM");
            }
        



AS you see  it will display days name. i want it should display month name also