"date_histogram" : {
"field" : "@timestamp",
"interval" : "day"
},
"aggregations": {
"salestime": {
"buckets": [
{
"key_as_string": "2018-04-02T00:00:00.000Z",
"key": 1522627200000,
"doc_count": 167,
so can i use my time zone?