I have an AGSGraphic that was returned from an AGSQueryTask. I want to do some custom formatting to the attributes before displaying them to the user. I have an attribute that I know is a valid date by checking the feature in ArcGIS Server's REST page for the feature class, but I'm not sure what the value I'm actually getting is. I tried casting it to an NSDate pointer and got a bad object. What do I need to do to this value to get a valid NSDate from it?