How to format date/time field to pathern YYYY-MMM-DD

pg38905522 20-03-2015

Hi,

I am using LC Designer ES2,

For the Date /time date format, this is automatocaly display on my form.

Another Think, How can i change display the date field to 2015-03-20. The defaut display 15-03-20

Thanks fot all Help

Pierre