DAX - transfer current context down multiple computation levels

Question

Dear,
I am highly struggling with DAX. I have a very complex query with 4 nested context levels (calculate inside calculate inside summarize inside....etc etc.) that computes a certain KPI based on a certain date.
The problem is that the query works fine via SSRS since I only need to pass one date which is explicitly passed with DATEVALUE(@parameter_name) whenever necessary.
Now I have a requirement to re-use that same logic but the input parameter now is the Year; which I must summarize and for every month compute that KPI based on the last day of the month. 
The query below is a reproduction of the issue I am having in a simpler manner:
DEFINE
    MEASURE 'Date'[Dt] =
        COUNTROWS (
            CALCULATETABLE (
                ADDCOLUMNS (
                    SUMMARIZE ( 'Date', 'Date'[bk_calendar] ),
                    "SecondLevel", CALCULATE (
                        COUNTROWS ( 'Date' ),
                        FILTER (
                            ALL ( 'Date' ),
                            'Date'[BK_Calendar]
                                > EOMONTH (
                                    DATEVALUE (
                                        --The line below returns error: Calculation error in measure 'Date'[Dt]: A table of multiple values was supplied where a single value was expected.
                                        VALUES ( 'Date'[Year] )
                                            & VALUES ( 'Date'[MonthNumber] )
                                            & "01"
                                    0
                --addcolumns
                FILTER (
                    ALL ( 'Date' ),
                    'Date'[BK_Calendar]
                        <= EOMONTH (
                            DATEVALUE (
                                VALUES ( 'Date'[Year] ) & "-"
                                    & VALUES ( 'Date'[MonthNumber] )
                                    & "01"
                            0
EVALUATE
CALCULATETABLE (
    ADDCOLUMNS (
        SUMMARIZE ( 'Date', 'Date'[Year], 'Date'[MonthNumber] ),
        "X", CALCULATE ( [Dt] )
    'Date'[Year] = 2014
As you can see, at the line where I get an error, I am trying to find out how to pass the current end of month date according to the row context in the summarize... but I have no clue how to proceed, all I tried has failed me, and reworking the query or
following a different approach is a too much work (regression impact on the existing).
Can anybody assist on this ?
Thanks in advance for your time
Miloud B.

Answer 1

Greg thanks again for your time.
Unfortunately this does not work either, it says: 
Calculation error in measure 'Date'[Dt]: An argument of function 'DATE' has the wrong data type or the result is too large or too small
Which is disturbing :-)
In the meantime I have found a workaround, a heavy one but it is all i gor for now, I actually have an accounting period dimension for finance data that is not related to my fact I am using for this calculation, although I can cheat with it to pass the date
I want as shown below:
DEFINE
    MEASURE 'Date'[Dt] =
        COUNTROWS (
            CALCULATETABLE (
                ADDCOLUMNS (
                    SUMMARIZE (
                        AccountingPeriod,
                        AccountingPeriod[RealAccountingPeriod]
                    "SecondLevel", CALCULATE (
                        COUNTROWS ( 'Date' ),
                        FILTER (
                            KEEPFILTERS ( 'Date' ),
                            'Date'[BK_Calendar]
                                > EOMONTH (
                                    DATEVALUE (
                                        LEFT ( AccountingPeriod[RealAccountingPeriod], 4 ) & "-"
                                            & RIGHT ( AccountingPeriod[RealAccountingPeriod], 2 )
                                            & "01"
                                    0
                --addcolumns
                FILTER (
                    ALL ( 'Date' ),
                    'Date'[BK_Calendar]
                        <= EOMONTH (
                            DATEVALUE (
                                VALUES ( 'Date'[Year] ) & "-"
                                    & VALUES ( 'Date'[MonthNumber] )
                                    & "01"
                            0
                FILTER (
                    ALL ( AccountingPeriod ),
                    AccountingPeriod[AccountingPeriodYear]
                        = VALUES ( 'Date'[Year] )
                        && AccountingPeriod[AccountingPeriodMonth]
                            = VALUES ( 'Date'[MonthNumber] )
EVALUATE
CALCULATETABLE (
    ADDCOLUMNS (
        SUMMARIZE ( 'Date', 'Date'[Year], 'Date'[MonthNumber] ),
        "X", CALCULATE ( [Dt] )
    'Date'[Year] = 2014
Thanks for your involvement anyway ;-)
Miloud