How to show day names,using date-histogram aggregation in elascticsearch

Question

I have been trying to use date histogram aggregation in elasticsearch and it returns the date as epoch or in yy-mm-dd-mm-ss format. But what I want is to get document count

Answer 1

For ES5 using painless, this works:

"aggs": {
    "dayOfWeek": {
        "terms": {
            "script": {
                "inline": "doc['date_utc'].date.dayOfWeek",
                "lang": "painless"
            }
        }
    }
}