0SD_C03 - 0BILL_DATE

Hi !

I need to add 0BILL_DATE to 0SD_C03 cube.

Do i have to add 0BILL_DATE as a characteristic of 0SD_C03

or as a time characteristic of 0SD_C03?

If i have to add it as a time characteristic,

how do i connect 0BILL_DATE to 0CALDAY ( i need that 0CALDAY will

refer to 0BILL_DATE ).

Please answer me in detail .

Thanks

Moshe