Question: how to change date format in windows server 2008 r2?
Answer: control panel==>region and language==>Formats===>Additional Settings===>Date and manually added the format. but it reverted back to mm/dd/yyyy (i.e 03/31/2015). and this format is propagated and applied to whole domain. so need to change the format permanently to dd/mm/yyyy (i.e 31/03/2015).