Fiscal Year Calculated Columns from date ranges

I'm creating a date table and I've used the Calendar() function as the basis.  So, I have a Date column in the Dates table, as well as other calculated columns for Month, Quarter, etc.  I want to add an additional calculated column for Fiscal Year, based on start and end dates defined in another table in my model.

I have a GLYEAR table that has the following structure:

Date Start_Date

Date End_Date

int  FRL_FISCAL_YEAR

Basically the psuedo code for the calculated colum should be "If Dates[Date] >= GLYEAR[START_DATE] and Dates[Date] <= GLYEAR[START_DATE] then FRL_FISCAL_YEAR

There is no existing relationship between Dates and GLYEAR.

Appreciate any pointers.