Kibana showing incorrect timestamp


I am having issue with how Kibana shows timestamps of my documents indexed in Elasticsearch.

I have a document looking like:

 "_index": "speedtest",
  "_type": "_doc",
  "_id": "1-nldXwBFYKxSrUSopKs",
  "_version": 1,
  "_score": 1,
  "_source": {
    "timestamp": "2021-10-12T21:05:55.825681",
    "upSpeed": 24.8,
    "downSpeed": 108
  "fields": {
    "upSpeed": [
    "downSpeed": [
    "timestamp": [

But kibana always shows time with +2 hours (Oct 12, 2021 @ 23:05:55.825). So whenever I use the quick time filters like last 15 minutes it shows 2hours old data.
I have set tried seting the dateFormat:tz to Europe/Prague which shows it with +2 hours. When I change it to GMT+0 it shows the time correctly but the quick filters still don't work.

I am using Kibana 7.15 and Elasticsearch 7.15
Tried it on earlier 7.12 too and had the same behaviour

Is there something I am missing?

When creating an index you must pay attention to the time field that you choose in the 2nd step you must choose the logdate, not the indexing time.

i have done a test with this log line in case you have to change only the timezone :


Filter :

filter {
    grok {
      match          => {
        "message"    => [
   date {
      match    => [ "logdate", "ISO8601", "yyyy-MM-dd HH:mm:ss.SSSSSS" ]
      timezone => "GMT"
      target   => "TIMESTAMP"


  "TIMESTAMP": "2021-10-12T21:05:55.825Z",
  "logdate": "2021-10-12T21:05:55.825681",
  "message": "2021-10-12T21:05:55.825681|aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"

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