Jquery - Deserialize Javascript Date On Server Mvc 3

I've been struggling with this issue for a while. I'm trying to send an object to the client. Once the client updates the object I'd like to post it back to the server and save it in my database. The first part works fine. However, when I send it back all the dates are messed up and start for year 0001. I assume that's because it can't deserialize the date. Howe can I post a json object with a date property and deserialize it into a type on the server with asp.net mvc 3? group is

public class Group
{
public Group();
public string CreatedBy { get; set; }
public DateTime CreatedOn { get; set; }
public string Description { get; set; }
public string Name{ get; set; }
public string Status { get; set; }
public string UpdatedBy { get; set; }
public DateTime UpdatedOn { get; set; }
}
while
public JsonResult updateGroup(Group group)
{
var result = Repository.updateGroup(group);
return Json(result, JsonRequestBehavior.AllowGet);
}

and on the client I got

$.ajax({
url: '../updateGroup',
type: 'POST',
data: JSON.stringify(group),
dataType: 'json',
contentType: 'application/json; charset=utf-8',
success: function(){ success(); }
});