Hi Paul,
Try this formula. just replace variable s value with your datefield value or modify it on your own way 
local stringvar s := "141223";
local stringvar d := mid(s,5,2);
local stringvar y := mid(s,1,2);
local stringvar m := mid(s,3,2);
local stringvar dt := m + "/" + d + "/" + y;
dt
Regrads,
Jim