Date Format in DateTimeEdit

I am trying to change the Date Format in the DateTimeEdit.  I want 'yyyy,mm,dd' however this does not seem to work.
I can get the String to reflect that format, but when the component pops up, it will not display with the year first. 
What am I doing wrong.

in gridInputsGetEditorType
grid.DateTimePicker.Format := 'yyyy/mm/dd';