Setting Client-Matter for Quarterly Billing when Quarter Does not Start in Traditional Month

The Billing Cycle options 0 through 9 are good to use for this purpose. These Billing Cycles are intended to be used by each Firm as desired. What you may want to do in this instance is determine that Billing Cycle 2 will be for those Matters where the quarter starts on February 1.  At the end of April, you would choose Billing Cycle 2 and the Matters assigned this Billing Cycle would generate a Prebill/Invoice.  You can use these Billing Cycles in any manner desired but you should be consistent in their usage.