Sorting Data by Date

I have a Column J with Dates formated in the dd/mm/yyyy format how do I used the Selection.Sort key:= xx order:= to sort the rows that have a date in the selected columns. Where J_End in the code below is the Column I need to refer to its sorting to a point but im not sure whats wrong with it.

All I really need it to do is group all the ones with a date (completed) and without a date (not completed) thus why im sorting it and the other stuff prioritize it.

Selection.Sort Key1:=Range("C_End"), Order1:=xlAscending, Key2:=Range("J_End") _
        , Order2:=xlAscending, Key3:=Range("B8"), Order3:=xlAscending, Header:=xlGuess, OrderCustom:=1, MatchCase:= _
        False, Orientation:=xlTopToBottom