Can we define adjustment periods in FA Calendar

Dear All,

Needed your advice on below query I had  for FA Calendar :

a) We have changed our calnedar from April to March in GL to January to December and created a short period in GL for current short year with 3 adjustment periods.

b) In FA we are using the same naming convention but I am not sure as to how the short year will be taken care.

c) I saw a metalink note which says that we can delete all furture period not in use and recreate the new calendar but it does not provide specific details as to what will hapopen for shorten year depreciation and YTD balances.