If Monday, September 27th is a teacher-directed Pro-D Day at your school and you have a staff meeting scheduled for that day, the meeting cannot happen during instructional hours, because a staff meeting is admin-directed, not teacher-directed.  

Pro-D funds cannot be used for any portion of the day if the staff meeting is scheduled during the school day.  

Furthermore, teachers are not required to be at their school site on teacher-directed Pro-D days; principals should not expect teachers to return to the school site in order to attend a staff meeting at the end of the day. For this reason, some principals choose to change the date of their monthly meeting, which is reasonable.