Nope I tried it from a brand new project, leaving in Planning status and
I still aren't able to adjust. It only gives me the option to set it
when I initially set up the project- then I cannot edit it after the
fact. So weird!! My concern with switching from Completion Date to Start
Date is that our users are going to be used to choosing a completion
date, creating the project, and then not being able to fix it after the
fact.