In which Format did the sql accepts the date ?

I found it get only mm-dd-yy format. is it like that

if i change the reginal setting -language from U.S. to U.K. it gives an error of date format. I have to convert it to save in sql from dd-mm- yy to mm-dd-yy.

I want the standard format to get saved as well as fetched by end user. what to do?