Hi Uma.
I beleive there are no date formating functions in RMS´s xml files.
There is one very easy way to do it, but You will need to create a small add-on, that will prepare dinamically a Sesion variable, with the information (date format) you need and print it out on the receipt where You need it. You will need to develop as a COM object (a DLL file), register it the file on the POS PC and make a small modification on the receipt file.
For this, if You don´t have this technical skills, please contact your RMS Partner. It is really a small development, we are talking hours...
BR, A.