sure, but if that field is bound to a table you will need to adjust your form design. make the date field that is bound to the table invisible, then create another visible unbound date text box. Then you can capture the full date value and put it in the invisible text box and reformat the visible one to only show the day with FORMAT() function. THen update this event every time the visible date box changes or loses its focus.
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I'd rather be surfing