When I enter (51615) the dates does not output (5/16/2015), the output is actually the following: concat("20", substring(translate(., "/", ""), 4, 2), "-0", substring(translate(., "/", ""), 1, 1), "-", substring(translate(., "/", ""), 2, 2)).
The second fields also does not hide. I have been trying to created a form, so an action reverts the error (2015-16-5).
Let me know for other ideas.