Dim Datum As String = "2017:09:11 12:04:20"
 
 
        Dim arr() As String = Datum.Split(" ")
        Dim arr1() As String = arr(0).Split(":")
 
        Array.Reverse(arr1)
 
        Datum = System.String.Join(":", arr1) & " " & arr(1)
 
        MessageBox.Show(Datum)

EALA FREYA FRESENA