I don't understand how's report_date related here. But I undestand why you can't use `=` but maybe you can use
`ng_reports__created_on__year=<year>, ng_reports__created_on__month=<month>, ng_reports__created_on__day=<day>`

or
```
d = datetime(2014,2,2,0,0,0)
ng_reports__created__on__gte=d
```

I prefer the third solution from all as it's the more simple to understand and on the db.