I want to write a function whereby I could count a cell if it is blank OR greater than a date.

This is a piece in what will be a much larger formula so looking to avoid a solution of SUM(countif(D:D,""),countif(D:D,">"&E1))

The function I have currently looks like this:

Sum((Countifs(D:D,{">"&E1,""}))

Where E1 = 12/1/2015

Thanks for your help!