Options for Changing Calendar for Fiscal Year End Change from Calendar year

We are going trhough a process that may require us to change our Fiscal Year from a Calendar Year to a Apr - Mar Fiscal year. The options that i can think of in order to do this in Oracle are below we are on version 12.06

1. Setup New Ledgers and new Organizaions to accomdate this

Cons - We would need to setup all new Balancing segments that are tied to the exisiting ledgers i believe since a balancing segment can't be tied to multiple ledgers

Transferring the historical data

Interface changes that are ledger and Ord specific

2. Reimplemetnation - Basically create a new Production environment and reimplement the Oracle modules and resuse the same chart of accoutns