Quarterly Accrual Reversal from Custom Subledger

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For Accrual Reversal Date in JERS, currently we are using Subledger sources like Same Day, First Date of Current Accounting Period, Last Day of Current Accounting Period, First Day of Next Accounting Period or Last Day of Next Accounting Period. 

Now we have requirement to reverse the accounting on first day of next quarter but couldn't find any source like First Day of Next Quarter. As a last option we are considering to introduce a new custom source "Reversal Date" which will be used as Accrual Reversal Date source in JERS. This field will be populated from source along with other transaction details.