How to filter date value

Hi, Experts,

I create a custom cds view, there is a date field, the preview result is as below:

I need to filter all records which this field value =‘0000-00-00“

in CDS View filter, how to write this formula?

I try to use "is null", then all items disappeared ,then I try to use =‘0000-00-00“, then sys error.

Please help.

RGDS

Joanna Qiu