Question: how to change mm/dd/yyyy to dd/mm/yyyy?
Answer: One way that I found is to right click the cell, go to format cells, then click date from the list given. The date option then allows you to choose various styles of date formatting. If you don't like any of the styles there, click custom, then you can type it mm-dd-yy or yy-dd-mm or dd-mm-yy.