Using one slicer (Date) with two different tables and two different date columns

Hi All, 

I'm a new in BI and Power BI world..

basically, I have 2 table T1 (ID , ......., Registration date)

T2 (reqest ID , ......., reqest date)
No relationship between them

I want to create one date slicer, that will filter all tables on dashboard..
I try to make table date that contain (ID , Registration date, reqest ID , reqest date) but the filter not work very well..

is there any possible solution
Thank you