Display of day in date columns [FAQ]
All date fields in reports, views, and display grids can display either "MM/DD/YYYY" or "Day Of Week, Month Day Year" simply based on the width of the column.
For example, if you want to see the Day Of Week, then expand the width of the column and then refresh/search. The day will then display. If you no longer want the Day Of Week to display, shrink the width of the column and then refresh/search.