Thanks for the help on this, I have finally tried to implemented it and I get the concept but I can not get the formula for step 3 correct. Or maybe it’s a problem with step 4. If I open my plan and look at the task field for the “Key Project Date” the date is transferred from the Finish date to the “Key Project Date” field for that task but is not rolled up. So when I do the Project custom date field equal to the “key Project Date” I don’t get a result. Does the Project custom date need to be equal to the max of the task field or something? I have it just equal to it.