Hi Holquist:
I believe the 'Edit Period End dates' show the last time 'Month End' was done in Adagio TIme & Billing and has nothing to do with 'Year End processing'.
They just show the last dates the Month-End was done, not the Fiscal periods in the current year like Ledger.
For instance, I only do month-end processing quarterly so my dates are:
Period 1; 12/31/16
Period 2; 9/30/16
Period 3; 6/30/16
Period 4; 3/31/16