FA bal first year

We added new company in E1 9.1. during the year and would like to add master and balance records. Just for this one company we would like to add the acquisition balances into the beginning balance from the acquisition date in the middle of the year. Instead of using the beginning balance to upload at the beginning of the year, we would like to upload balances in the acquisition date at the middle of the year. I am looking at the option to setup short date pattern. Is it possible to setup short year just for this one company and