Excel weird behaviour with dates => text

Question

I have a ton of cells that contain dates such as 22/12/2013. This is set automatically as Date format. And if I try to change the cell format to text (Simply because I want

Answer 1

It's not an error. Changing the format of a cell does not change the value that is stored in that cell. Excel stores dates as numerical values. What I think you want to do is change the numerical value into text that resembles a date. Try this formula in a new cell somewhere:

= TEXT(A1,"dd/mm/yyyy")