To select from a calendar, click the calendar icon 
to the right.
To move the date one day at a time:
Click the > button to display dates after this, one day at a time, until the correct date is displayed.
Click the < button to move back one day at a time (down to today's date).
To select from a calendar, click the calendar icon to the right.
To display a different month, click the 3 (Previous month) or 4 (Next month) buttons beside the name of the currently displayed month.
Click the correct date.
Click OK (ALT+O).