Date issue when converting seperators

Hi all, I have a download which stores dates in the format as follows 04.01.2017.

To convert them to an actual date I use a piece of code below

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However, when I do this, it stores the date as 01/04/2017. I am sure this is an easy fix / add in to the code that has been asked before but I can't find the solution.

Can someone assist please?

TIA