SORLY, LLP has about 25 LLC members and has properly elected to file a Form 1065 partnership return. ShawnCo is a 30% owner and OrdeanCo is a 16% owner. Both of these companies have June 30 tax year ends. Redford, Inc., Le, Inc, and Yakuma, Inc., each own 4% (12% total) and have September 30 taxable year ends. The other LLC members (42% total) each own interests of 4% or less and use the calendar year (December 31). Assuming no election is made to use a natural business year, and the members have no interest in paying an adjustment fee to the IRS for a non-standard fiscal year end, what is the required fiscal year end of SORLY?