Date range filter for document with multiple dates

Please format your code using </> icon as explained in this guide. It will make your post more readable.

Or use markdown style like:

```
CODE
```

I believe you can index that as:

{
  "event_date": [ "2017-06-02", "2017-06-04", "2017-06-06" ]
}

Unsure if this will solve your use case though.