Cant create relationship between Date and Calender[Date] .

now i have multiple tables CFS_Import , CFS_Export and CL now i have one more table name List , so i have created relationship between These three tables and the List table , now i when i create a new table named Calendar which contains only Date column , i want to link all the three table Date column with this column , so that when i drag this Calendar[Date] in any slicer it can act as a unified date slicer or when i drag it to x-axis of any line chart and add revenues of different table it will work 'fine , but i am only able to make relationship between one of the table and the rest two table's relationship turns inactive and when i try to turn it active it gives error for ambiguity.