public static void Main()
string format = "ddd MMM d yyyy";
foreach (Person value in People)
Console.WriteLine(DateTime.Parse(value.Birthday).ToString(format));
static Person[] People = new Person[]
FirstName = "Andrew", Birthday = "5/1/92"
FirstName = "Andy", Birthday = "11/26/80"
FirstName = "Arron", Birthday = "08/09/90"
FirstName = "David", Birthday = "12/29/1989"
FirstName = "Stacey", Birthday = "11/01/82 12:35:00"
FirstName = "Tom", Birthday = null